156664616 has 8 divisors (see below), whose sum is σ = 293746170. Its totient is φ = 78332304.

The previous prime is 156664591. The next prime is 156664619. The reversal of 156664616 is 616466651.

It can be written as a sum of positive squares in only one way, i.e., 155102116 + 1562500 = 12454^2 + 1250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×156664616⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (156664619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9791531 + ... + 9791546.

Almost surely, 2^156664616 is an apocalyptic number.

It is an amenable number.

156664616 is a deficient number, since it is larger than the sum of its proper divisors (137081554).

156664616 is a wasteful number, since it uses less digits than its factorization.

156664616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19583083 (or 19583079 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 156664616 is about 12516.5736525616. The cubic root of 156664616 is about 539.0846587225.

The spelling of 156664616 in words is "one hundred fifty-six million, six hundred sixty-four thousand, six hundred sixteen".