1366274880 has 168 divisors, whose sum is σ = 4727182824. Its totient is φ = 362188800.

The previous prime is 1366274879. The next prime is 1366274881. The reversal of 1366274880 is 884726631.

1366274880 is a `hidden beast` number, since 13 + 6 + 627 + 4 + 8 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1366274879) and next prime (1366274881).

It can be written as a sum of positive squares in 4 ways, for example, as 33732864 + 1332542016 = 5808^2 + 36504^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366274881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 519970 + ... + 522590.

It is an arithmetic number, because the mean of its divisors is an integer number (28137993).

Almost surely, 2^1366274880 is an apocalyptic number.

1366274880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366274880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2363591412).

1366274880 is an abundant number, since it is smaller than the sum of its proper divisors (3360907944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1366274880 is a wasteful number, since it uses less digits than its factorization.

1366274880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2812 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 1366274880 is about 36963.1557094358. The cubic root of 1366274880 is about 1109.6329928625.

The spelling of 1366274880 in words is "one billion, three hundred sixty-six million, two hundred seventy-four thousand, eight hundred eighty".