669097520 has 80 divisors (see below), whose sum is σ = 1914669120. Its totient is φ = 211756032.

The previous prime is 669097453. The next prime is 669097537. The reversal of 669097520 is 25790966.

669097520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38675 + ... + 53234.

It is an arithmetic number, because the mean of its divisors is an integer number (23933364).

Almost surely, 2^669097520 is an apocalyptic number.

It is an amenable number.

669097520 is an abundant number, since it is smaller than the sum of its proper divisors (1245571600).

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

669097520 is a wasteful number, since it uses less digits than its factorization.

669097520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91942 (or 91936 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 669097520 is about 25866.9194145727. The cubic root of 669097520 is about 874.6409498293.

The spelling of 669097520 in words is "six hundred sixty-nine million, ninety-seven thousand, five hundred twenty".