156891660 has 96 divisors (see below), whose sum is σ = 452874240. Its totient is φ = 40564992.

The previous prime is 156891643. The next prime is 156891697. The reversal of 156891660 is 66198651.

It is a happy number.

156891660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×156891660² = 49229985955111200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327301 + ... + 327779.

It is an arithmetic number, because the mean of its divisors is an integer number (4717440).

Almost surely, 2^156891660 is an apocalyptic number.

156891660 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 156891660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226437120).

156891660 is an abundant number, since it is smaller than the sum of its proper divisors (295982580).

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

156891660 is a wasteful number, since it uses less digits than its factorization.

156891660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 156891660 is about 12525.6401034039. The cubic root of 156891660 is about 539.3449533168.

The spelling of 156891660 in words is "one hundred fifty-six million, eight hundred ninety-one thousand, six hundred sixty".