669438584 has 8 divisors (see below), whose sum is σ = 1255197360. Its totient is φ = 334719288.

The previous prime is 669438569. The next prime is 669438589. The reversal of 669438584 is 485834966.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669438589) 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 as a sum of consecutive naturals, namely, 41839904 + ... + 41839919.

It is an arithmetic number, because the mean of its divisors is an integer number (156899670).

Almost surely, 2^669438584 is an apocalyptic number.

It is an amenable number.

669438584 is a deficient number, since it is larger than the sum of its proper divisors (585758776).

669438584 is a wasteful number, since it uses less digits than its factorization.

669438584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83679829 (or 83679825 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 53.

The square root of 669438584 is about 25873.5112421952. The cubic root of 669438584 is about 874.7895369734.

The spelling of 669438584 in words is "six hundred sixty-nine million, four hundred thirty-eight thousand, five hundred eighty-four".