677925392665 has 4 divisors (see below), whose sum is σ = 813510471204. Its totient is φ = 542340314128.

The previous prime is 677925392659. The next prime is 677925392671. The reversal of 677925392665 is 566293529776.

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

It is an interprime number because it is at equal distance from previous prime (677925392659) and next prime (677925392671).

It can be written as a sum of positive squares in 2 ways, for example, as 343039804416 + 334885588249 = 585696^2 + 578693^2 .

It is a cyclic number.

It is not a de Polignac number, because 677925392665 - 2³⁹ = 128169578777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 677925392665.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67792539262 + ... + 67792539271.

It is an arithmetic number, because the mean of its divisors is an integer number (203377617801).

Almost surely, 2^677925392665 is an apocalyptic number.

It is an amenable number.

677925392665 is a deficient number, since it is larger than the sum of its proper divisors (135585078539).

677925392665 is a wasteful number, since it uses less digits than its factorization.

677925392665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135585078538.

The product of its digits is 257191200, while the sum is 67.

The spelling of 677925392665 in words is "six hundred seventy-seven billion, nine hundred twenty-five million, three hundred ninety-two thousand, six hundred sixty-five".