689594665 has 8 divisors (see below), whose sum is σ = 828197568. Its totient is φ = 551219760.

The previous prime is 689594657. The next prime is 689594677. The reversal of 689594665 is 566495986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 689594665 - 2³ = 689594657 is a prime.

It is a Duffinian number.

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, 50271 + ... + 62500.

It is an arithmetic number, because the mean of its divisors is an integer number (103524696).

Almost surely, 2^689594665 is an apocalyptic number.

It is an amenable number.

689594665 is a deficient number, since it is larger than the sum of its proper divisors (138602903).

689594665 is a wasteful number, since it uses less digits than its factorization.

689594665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113999.

The product of its digits is 13996800, while the sum is 58.

The square root of 689594665 is about 26260.1345198382. The cubic root of 689594665 is about 883.4825262025.

The spelling of 689594665 in words is "six hundred eighty-nine million, five hundred ninety-four thousand, six hundred sixty-five".