677247681 has 16 divisors (see below), whose sum is σ = 1001239488. Its totient is φ = 403723200.

The previous prime is 677247677. The next prime is 677247689. The reversal of 677247681 is 186742776.

It is not a de Polignac number, because 677247681 - 2² = 677247677 is a prime.

It is a super-2 number, since 2×677247681² = 917328842839755522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 677247681.

It is not an unprimeable number, because it can be changed into a prime (677247689) 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, 166206 + ... + 170231.

It is an arithmetic number, because the mean of its divisors is an integer number (62577468).

Almost surely, 2^677247681 is an apocalyptic number.

677247681 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

677247681 is a deficient number, since it is larger than the sum of its proper divisors (323991807).

677247681 is a wasteful number, since it uses less digits than its factorization.

677247681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336512.

The product of its digits is 790272, while the sum is 48.

The square root of 677247681 is about 26023.9828043288. The cubic root of 677247681 is about 878.1779107373.

The spelling of 677247681 in words is "six hundred seventy-seven million, two hundred forty-seven thousand, six hundred eighty-one".