659980845 has 32 divisors (see below), whose sum is σ = 1177123200. Its totient is φ = 350842752.

The previous prime is 659980823. The next prime is 659980859. The reversal of 659980845 is 548089956.

It is a happy number.

659980845 is a `hidden beast` number, since 6 + 599 + 8 + 0 + 8 + 45 = 666.

It is not a de Polignac number, because 659980845 - 2²⁸ = 391545389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 659980791 and 659980800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34446 + ... + 50064.

It is an arithmetic number, because the mean of its divisors is an integer number (36785100).

Almost surely, 2^659980845 is an apocalyptic number.

It is an amenable number.

659980845 is a deficient number, since it is larger than the sum of its proper divisors (517142355).

659980845 is a wasteful number, since it uses less digits than its factorization.

659980845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15946 (or 15940 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The square root of 659980845 is about 25690.0923509434. The cubic root of 659980845 is about 870.6503460719.

The spelling of 659980845 in words is "six hundred fifty-nine million, nine hundred eighty thousand, eight hundred forty-five".