677656440 has 96 divisors (see below), whose sum is σ = 2206666800. Its totient is φ = 180357120.

The previous prime is 677656439. The next prime is 677656457. The reversal of 677656440 is 44656776.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221320 + ... + 224360.

Almost surely, 2^677656440 is an apocalyptic number.

677656440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 677656440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1103333400).

677656440 is an abundant number, since it is smaller than the sum of its proper divisors (1529010360).

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

677656440 is a wasteful number, since it uses less digits than its factorization.

677656440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677 (or 3670 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The square root of 677656440 is about 26031.8351254767. The cubic root of 677656440 is about 878.3545526269.

The spelling of 677656440 in words is "six hundred seventy-seven million, six hundred fifty-six thousand, four hundred forty".