667923667158 has 64 divisors (see below), whose sum is σ = 1469489299200. Its totient is φ = 200712524160.

The previous prime is 667923667153. The next prime is 667923667181. The reversal of 667923667158 is 851766329766.

667923667158 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 2×667923667158² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667923667153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4366413 + ... + 4516791.

It is an arithmetic number, because the mean of its divisors is an integer number (22960770300).

Almost surely, 2^667923667158 is an apocalyptic number.

667923667158 is an abundant number, since it is smaller than the sum of its proper divisors (801565632042).

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

667923667158 is a wasteful number, since it uses less digits than its factorization.

667923667158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150957.

The product of its digits is 137168640, while the sum is 66.

The spelling of 667923667158 in words is "six hundred sixty-seven billion, nine hundred twenty-three million, six hundred sixty-seven thousand, one hundred fifty-eight".