677707956 has 18 divisors (see below), whose sum is σ = 1713095202. Its totient is φ = 225902640.

The previous prime is 677707939. The next prime is 677707969. The reversal of 677707956 is 659707776.

It can be written as a sum of positive squares in only one way, i.e., 444535056 + 233172900 = 21084^2 + 15270^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9412575 + ... + 9412646.

Almost surely, 2^677707956 is an apocalyptic number.

It is an amenable number.

677707956 is an abundant number, since it is smaller than the sum of its proper divisors (1035387246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

677707956 is a wasteful number, since it uses less digits than its factorization.

677707956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18825231 (or 18825226 counting only the distinct ones).

The product of its (nonzero) digits is 3889620, while the sum is 54.

The square root of 677707956 is about 26032.8245874319. The cubic root of 677707956 is about 878.3768098081.

The spelling of 677707956 in words is "six hundred seventy-seven million, seven hundred seven thousand, nine hundred fifty-six".