677724891 has 16 divisors (see below), whose sum is σ = 920263680. Its totient is φ = 443555840.

The previous prime is 677724871. The next prime is 677724937. The reversal of 677724891 is 198427776.

It is a cyclic number.

It is not a de Polignac number, because 677724891 - 2²⁵ = 644170459 is a prime.

It is a super-2 number, since 2×677724891² = 918622055761923762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (677724811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44251 + ... + 57563.

It is an arithmetic number, because the mean of its divisors is an integer number (57516480).

Almost surely, 2^677724891 is an apocalyptic number.

677724891 is a deficient number, since it is larger than the sum of its proper divisors (242538789).

677724891 is a wasteful number, since it uses less digits than its factorization.

677724891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13626.

The product of its digits is 1185408, while the sum is 51.

The square root of 677724891 is about 26033.1498478382. The cubic root of 677724891 is about 878.3841262277.

The spelling of 677724891 in words is "six hundred seventy-seven million, seven hundred twenty-four thousand, eight hundred ninety-one".