667929625164031 has 4 divisors (see below), whose sum is σ = 690961681204200. Its totient is φ = 644897569123864.

The previous prime is 667929625164029. The next prime is 667929625164049. The reversal of 667929625164031 is 130461526929766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 667929625164031 - 2¹ = 667929625164029 is a prime.

It is a super-2 number, since 2×667929625164031² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667929625164931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11516028020041 + ... + 11516028020098.

It is an arithmetic number, because the mean of its divisors is an integer number (172740420301050).

Almost surely, 2^{667929625164031} is an apocalyptic number.

667929625164031 is a deficient number, since it is larger than the sum of its proper divisors (23032056040169).

667929625164031 is a wasteful number, since it uses less digits than its factorization.

667929625164031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23032056040168.

The product of its (nonzero) digits is 176359680, while the sum is 67.

The spelling of 667929625164031 in words is "six hundred sixty-seven trillion, nine hundred twenty-nine billion, six hundred twenty-five million, one hundred sixty-four thousand, thirty-one".