156668922 has 12 divisors (see below), whose sum is σ = 339449370. Its totient is φ = 52222968.

The previous prime is 156668921. The next prime is 156668951. The reversal of 156668922 is 229866651.

It can be written as a sum of positive squares in only one way, i.e., 151511481 + 5157441 = 12309^2 + 2271^2 .

It is a super-2 number, since 2×156668922² = 49090302241284168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (156668921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4351897 + ... + 4351932.

Almost surely, 2^156668922 is an apocalyptic number.

156668922 is an abundant number, since it is smaller than the sum of its proper divisors (182780448).

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

156668922 is a wasteful number, since it uses less digits than its factorization.

156668922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8703837 (or 8703834 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 156668922 is about 12516.7456633104. The cubic root of 156668922 is about 539.0895976750.

The spelling of 156668922 in words is "one hundred fifty-six million, six hundred sixty-eight thousand, nine hundred twenty-two".