1366261272 has 192 divisors, whose sum is σ = 4104172800. Its totient is φ = 408672000.

The previous prime is 1366261243. The next prime is 1366261277. The reversal of 1366261272 is 2721626631.

1366261272 is a `hidden beast` number, since 1 + 3 + 6 + 626 + 1 + 27 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366261277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5443147 + ... + 5443397.

It is an arithmetic number, because the mean of its divisors is an integer number (21375900).

Almost surely, 2^1366261272 is an apocalyptic number.

1366261272 is a gapful number since it is divisible by the number (12) 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 1366261272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052086400).

1366261272 is an abundant number, since it is smaller than the sum of its proper divisors (2737911528).

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

1366261272 is a wasteful number, since it uses less digits than its factorization.

1366261272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 471 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 1366261272 is about 36962.9716337851. The cubic root of 1366261272 is about 1109.6293088952.

The spelling of 1366261272 in words is "one billion, three hundred sixty-six million, two hundred sixty-one thousand, two hundred seventy-two".