664125663677 has 12 divisors (see below), whose sum is σ = 783435394656. Its totient is φ = 561232952280.

The previous prime is 664125663659. The next prime is 664125663703. The reversal of 664125663677 is 776366521466.

It is not a de Polignac number, because 664125663677 - 2²² = 664121469373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664125663977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95444303 + ... + 95451260.

It is an arithmetic number, because the mean of its divisors is an integer number (65286282888).

Almost surely, 2^664125663677 is an apocalyptic number.

It is an amenable number.

664125663677 is a deficient number, since it is larger than the sum of its proper divisors (119309730979).

664125663677 is a wasteful number, since it uses less digits than its factorization.

664125663677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190895648 (or 190895641 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 59.

The spelling of 664125663677 in words is "six hundred sixty-four billion, one hundred twenty-five million, six hundred sixty-three thousand, six hundred seventy-seven".