669809032 has 16 divisors (see below), whose sum is σ = 1282613760. Its totient is φ = 327778704.

The previous prime is 669809017. The next prime is 669809047. The reversal of 669809032 is 230908966.

It is an interprime number because it is at equal distance from previous prime (669809017) and next prime (669809047).

It is a self number, because there is not a number n which added to its sum of digits gives 669809032.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890328 + ... + 891079.

It is an arithmetic number, because the mean of its divisors is an integer number (80163360).

Almost surely, 2^669809032 is an apocalyptic number.

It is an amenable number.

669809032 is a deficient number, since it is larger than the sum of its proper divisors (612804728).

669809032 is a wasteful number, since it uses less digits than its factorization.

669809032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781460 (or 1781456 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 669809032 is about 25880.6690794500. The cubic root of 669809032 is about 874.9508683161.

The spelling of 669809032 in words is "six hundred sixty-nine million, eight hundred nine thousand, thirty-two".