677721144 has 32 divisors (see below), whose sum is σ = 1735629840. Its totient is φ = 220396800.

The previous prime is 677721137. The next prime is 677721157. The reversal of 677721144 is 441127776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343387 + ... + 345354.

Almost surely, 2^677721144 is an apocalyptic number.

It is an amenable number.

677721144 is an abundant number, since it is smaller than the sum of its proper divisors (1057908696).

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

677721144 is a wasteful number, since it uses less digits than its factorization.

677721144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688791 (or 688787 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 677721144 is about 26033.0778818026. The cubic root of 677721144 is about 878.3825074237.

The spelling of 677721144 in words is "six hundred seventy-seven million, seven hundred twenty-one thousand, one hundred forty-four".