677166640 has 20 divisors (see below), whose sum is σ = 1574412624. Its totient is φ = 270866624.

The previous prime is 677166629. The next prime is 677166643. The reversal of 677166640 is 46661776.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (677166643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4232212 + ... + 4232371.

Almost surely, 2^677166640 is an apocalyptic number.

It is an amenable number.

677166640 is an abundant number, since it is smaller than the sum of its proper divisors (897245984).

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

677166640 is a wasteful number, since it uses less digits than its factorization.

677166640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8464596 (or 8464590 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 677166640 is about 26022.4257132190. The cubic root of 677166640 is about 878.1428810837.

The spelling of 677166640 in words is "six hundred seventy-seven million, one hundred sixty-six thousand, six hundred forty".