677318557651 has 4 divisors (see below), whose sum is σ = 679164112672. Its totient is φ = 675473002632.

The previous prime is 677318557577. The next prime is 677318557667. The reversal of 677318557651 is 156755813776.

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

It is a cyclic number.

It is not a de Polignac number, because 677318557651 - 2²⁹ = 676781686739 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 677318557651.

It is not an unprimeable number, because it can be changed into a prime (677318557051) 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, 922776960 + ... + 922777693.

It is an arithmetic number, because the mean of its divisors is an integer number (169791028168).

Almost surely, 2^677318557651 is an apocalyptic number.

677318557651 is a deficient number, since it is larger than the sum of its proper divisors (1845555021).

677318557651 is a wasteful number, since it uses less digits than its factorization.

677318557651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845555020.

The product of its digits is 37044000, while the sum is 61.

The spelling of 677318557651 in words is "six hundred seventy-seven billion, three hundred eighteen million, five hundred fifty-seven thousand, six hundred fifty-one".