667929625164028 has 6 divisors (see below), whose sum is σ = 1168876844037056. Its totient is φ = 333964812582012.

The previous prime is 667929625164019. The next prime is 667929625164029. The reversal of 667929625164028 is 820461526929766.

It is a super-2 number, since 2×667929625164028² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667929625164029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83491203145500 + ... + 83491203145507.

Almost surely, 2^{667929625164028} is an apocalyptic number.

It is an amenable number.

667929625164028 is a deficient number, since it is larger than the sum of its proper divisors (500947218873028).

667929625164028 is a wasteful number, since it uses less digits than its factorization.

667929625164028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166982406291011 (or 166982406291009 counting only the distinct ones).

The product of its (nonzero) digits is 940584960, while the sum is 73.

The spelling of 667929625164028 in words is "six hundred sixty-seven trillion, nine hundred twenty-nine billion, six hundred twenty-five million, one hundred sixty-four thousand, twenty-eight".