669921875 has 40 divisors (see below), whose sum is σ = 976562400. Its totient is φ = 459375000.

The previous prime is 669921871. The next prime is 669921881. The reversal of 669921875 is 578129966.

The cubic root of 669921875 is 875.

It is a perfect power (a cube), and thus also a powerful number.

It is not a de Polignac number, because 669921875 - 2² = 669921871 is a prime.

Its product of digits (1632960) is a multiple of the sum of its prime divisors (12).

It is not an unprimeable number, because it can be changed into a prime (669921871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 95703122 + ... + 95703128.

It is an arithmetic number, because the mean of its divisors is an integer number (24414060).

Almost surely, 2^669921875 is an apocalyptic number.

669921875 is a deficient number, since it is larger than the sum of its proper divisors (306640525).

669921875 is an frugal number, since it uses more digits than its factorization.

669921875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66 (or 12 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The square root of 669921875 is about 25882.8490510608.

The spelling of 669921875 in words is "six hundred sixty-nine million, nine hundred twenty-one thousand, eight hundred seventy-five".