1366648020 has 144 divisors (see below), whose sum is σ = 4531258368. Its totient is φ = 331914240.

The previous prime is 1366647991. The next prime is 1366648027. The reversal of 1366648020 is 208466631.

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 (1366648027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87657 + ... + 102063.

It is an arithmetic number, because the mean of its divisors is an integer number (31467072).

Almost surely, 2^1366648020 is an apocalyptic number.

1366648020 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 1366648020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2265629184).

1366648020 is an abundant number, since it is smaller than the sum of its proper divisors (3164610348).

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

1366648020 is a wasteful number, since it uses less digits than its factorization.

1366648020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14470 (or 14465 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1366648020 is about 36968.2028235077. The cubic root of 1366648020 is about 1109.7340000545.

The spelling of 1366648020 in words is "one billion, three hundred sixty-six million, six hundred forty-eight thousand, twenty".