677237706514561 has 4 divisors (see below), whose sum is σ = 690015776448852. Its totient is φ = 664459636580272.

The previous prime is 677237706514553. The next prime is 677237706514679. The reversal of 677237706514561 is 165415607732776.

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

It can be written as a sum of positive squares in 2 ways, for example, as 480773331783936 + 196464374730625 = 21926544^2 + 14016575^2 .

It is a cyclic number.

It is not a de Polignac number, because 677237706514561 - 2³ = 677237706514553 is a prime.

It is a super-2 number, since 2×677237706514561² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677237706514511) 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, 6389034967066 + ... + 6389034967171.

It is an arithmetic number, because the mean of its divisors is an integer number (172503944112213).

Almost surely, 2^{677237706514561} is an apocalyptic number.

It is an amenable number.

677237706514561 is a deficient number, since it is larger than the sum of its proper divisors (12778069934291).

677237706514561 is a wasteful number, since it uses less digits than its factorization.

677237706514561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12778069934290.

The product of its (nonzero) digits is 311169600, while the sum is 67.

The spelling of 677237706514561 in words is "six hundred seventy-seven trillion, two hundred thirty-seven billion, seven hundred six million, five hundred fourteen thousand, five hundred sixty-one".