689594668 has 24 divisors (see below), whose sum is σ = 1379814912. Its totient is φ = 295406544.

The previous prime is 689594657. The next prime is 689594677. The reversal of 689594668 is 866495986.

It is a super-2 number, since 2×689594668² = 951081612268060448, which contains 22 as substring.

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, 80571 + ... + 88717.

It is an arithmetic number, because the mean of its divisors is an integer number (57492288).

Almost surely, 2^689594668 is an apocalyptic number.

It is an amenable number.

689594668 is an abundant number, since it is smaller than the sum of its proper divisors (690220244).

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

689594668 is a wasteful number, since it uses less digits than its factorization.

689594668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11181 (or 11179 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 61.

The square root of 689594668 is about 26260.1345769590. The cubic root of 689594668 is about 883.4825274837.

The spelling of 689594668 in words is "six hundred eighty-nine million, five hundred ninety-four thousand, six hundred sixty-eight".