677046640 has 20 divisors (see below), whose sum is σ = 1574133624. Its totient is φ = 270818624.

The previous prime is 677046611. The next prime is 677046659. The reversal of 677046640 is 46640776.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 677046593 and 677046602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4231462 + ... + 4231621.

Almost surely, 2^677046640 is an apocalyptic number.

It is an amenable number.

677046640 is an abundant number, since it is smaller than the sum of its proper divisors (897086984).

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

677046640 is a wasteful number, since it uses less digits than its factorization.

677046640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8463096 (or 8463090 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 677046640 is about 26020.1199074870. The cubic root of 677046640 is about 878.0910064221.

The spelling of 677046640 in words is "six hundred seventy-seven million, forty-six thousand, six hundred forty".