156668812 has 6 divisors (see below), whose sum is σ = 274170428. Its totient is φ = 78334404.

The previous prime is 156668807. The next prime is 156668819. The reversal of 156668812 is 218866651.

It is not an unprimeable number, because it can be changed into a prime (156668819) 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 as a sum of consecutive naturals, namely, 19583598 + ... + 19583605.

Almost surely, 2^156668812 is an apocalyptic number.

It is an amenable number.

156668812 is a deficient number, since it is larger than the sum of its proper divisors (117501616).

156668812 is a wasteful number, since it uses less digits than its factorization.

156668812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39167207 (or 39167205 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 156668812 is about 12516.7412691962. The cubic root of 156668812 is about 539.0894715069.

The spelling of 156668812 in words is "one hundred fifty-six million, six hundred sixty-eight thousand, eight hundred twelve".