681330986 has 12 divisors (see below), whose sum is σ = 1188853218. Its totient is φ = 291998952.

The previous prime is 681330929. The next prime is 681331031. The reversal of 681330986 is 689033186.

It can be written as a sum of positive squares in only one way, i.e., 525555625 + 155775361 = 22925^2 + 12481^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3476081 + ... + 3476276.

Almost surely, 2^681330986 is an apocalyptic number.

681330986 is a deficient number, since it is larger than the sum of its proper divisors (507522232).

681330986 is a wasteful number, since it uses less digits than its factorization.

681330986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6952373 (or 6952366 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 681330986 is about 26102.3176365625. The cubic root of 681330986 is about 879.9392976379.

The spelling of 681330986 in words is "six hundred eighty-one million, three hundred thirty thousand, nine hundred eighty-six".