677781965583 has 12 divisors (see below), whose sum is σ = 980890329640. Its totient is φ = 450990673776.

The previous prime is 677781965527. The next prime is 677781965587. The reversal of 677781965583 is 385569187776.

677781965583 is a `hidden beast` number, since 67 + 7 + 7 + 8 + 1 + 9 + 6 + 558 + 3 = 666.

It is not a de Polignac number, because 677781965583 - 2¹⁴ = 677781949199 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 (677781965587) 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, 71992528 + ... + 72001941.

Almost surely, 2^677781965583 is an apocalyptic number.

677781965583 is a deficient number, since it is larger than the sum of its proper divisors (303108364057).

677781965583 is a wasteful number, since it uses less digits than its factorization.

677781965583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143994998 (or 143994995 counting only the distinct ones).

The product of its digits is 533433600, while the sum is 72.

The spelling of 677781965583 in words is "six hundred seventy-seven billion, seven hundred eighty-one million, nine hundred sixty-five thousand, five hundred eighty-three".