682665978 has 16 divisors (see below), whose sum is σ = 1365588000. Its totient is φ = 227512656.

The previous prime is 682665961. The next prime is 682666043. The reversal of 682665978 is 879566286.

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, 57576 + ... + 68412.

It is an arithmetic number, because the mean of its divisors is an integer number (85349250).

Almost surely, 2^682665978 is an apocalyptic number.

682665978 is an abundant number, since it is smaller than the sum of its proper divisors (682922022).

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

682665978 is a wasteful number, since it uses less digits than its factorization.

682665978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21341.

The product of its digits is 8709120, while the sum is 57.

The square root of 682665978 is about 26127.8774109188. The cubic root of 682665978 is about 880.5136369542.

The spelling of 682665978 in words is "six hundred eighty-two million, six hundred sixty-five thousand, nine hundred seventy-eight".