156665560 has 16 divisors (see below), whose sum is σ = 352497600. Its totient is φ = 62666208.

The previous prime is 156665533. The next prime is 156665563. The reversal of 156665560 is 65566651.

156665560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×156665560² = 49088195380227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 3916639 = 156665560 / (1 + 5 + 6 + 6 + 6 + 5 + 5 + 6 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156665563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958280 + ... + 1958359.

It is an arithmetic number, because the mean of its divisors is an integer number (22031100).

Almost surely, 2^156665560 is an apocalyptic number.

156665560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156665560 is an abundant number, since it is smaller than the sum of its proper divisors (195832040).

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

156665560 is a wasteful number, since it uses less digits than its factorization.

156665560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916650 (or 3916646 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 156665560 is about 12516.6113625054. The cubic root of 156665560 is about 539.0857414918.

The spelling of 156665560 in words is "one hundred fifty-six million, six hundred sixty-five thousand, five hundred sixty".