689992664 has 32 divisors (see below), whose sum is σ = 1306368000. Its totient is φ = 341641632.

The previous prime is 689992643. The next prime is 689992717. The reversal of 689992664 is 466299986.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799097 + ... + 799959.

It is an arithmetic number, because the mean of its divisors is an integer number (40824000).

Almost surely, 2^689992664 is an apocalyptic number.

It is an amenable number.

689992664 is a deficient number, since it is larger than the sum of its proper divisors (616375336).

689992664 is a wasteful number, since it uses less digits than its factorization.

689992664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727 (or 1723 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 59.

The square root of 689992664 is about 26267.7114343827. The cubic root of 689992664 is about 883.6524605880.

The spelling of 689992664 in words is "six hundred eighty-nine million, nine hundred ninety-two thousand, six hundred sixty-four".