664558125231 has 108 divisors (see below), whose sum is σ = 1226826376776. Its totient is φ = 318667789440.

The previous prime is 664558125197. The next prime is 664558125241. The reversal of 664558125231 is 132521855466.

It is not a de Polignac number, because 664558125231 - 2¹⁰ = 664558124207 is a prime.

It is a super-2 number, since 2×664558125231² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664558125241) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2895465 + ... + 3116541.

Almost surely, 2^664558125231 is an apocalyptic number.

664558125231 is a deficient number, since it is larger than the sum of its proper divisors (562268251545).

664558125231 is a wasteful number, since it uses less digits than its factorization.

664558125231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221142 (or 221111 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The spelling of 664558125231 in words is "six hundred sixty-four billion, five hundred fifty-eight million, one hundred twenty-five thousand, two hundred thirty-one".