689866506 has 48 divisors (see below), whose sum is σ = 1709967168. Its totient is φ = 196905600.

The previous prime is 689866493. The next prime is 689866523. The reversal of 689866506 is 605668986.

It is a super-2 number, since 2×689866506² = 951831592201296072, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 160546 + ... + 164786.

It is an arithmetic number, because the mean of its divisors is an integer number (35624316).

Almost surely, 2^689866506 is an apocalyptic number.

689866506 is an abundant number, since it is smaller than the sum of its proper divisors (1020100662).

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

689866506 is a wasteful number, since it uses less digits than its factorization.

689866506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5547 (or 5544 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 689866506 is about 26265.3099353501. The cubic root of 689866506 is about 883.5986017438.

The spelling of 689866506 in words is "six hundred eighty-nine million, eight hundred sixty-six thousand, five hundred six".