669439437 has 32 divisors (see below), whose sum is σ = 934809216. Its totient is φ = 425779200.

The previous prime is 669439427. The next prime is 669439469. The reversal of 669439437 is 734934966.

It is not a de Polignac number, because 669439437 - 2⁸ = 669439181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 669439437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669439417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1896253 + ... + 1896605.

It is an arithmetic number, because the mean of its divisors is an integer number (29212788).

Almost surely, 2^669439437 is an apocalyptic number.

It is an amenable number.

669439437 is a deficient number, since it is larger than the sum of its proper divisors (265369779).

669439437 is a wasteful number, since it uses less digits than its factorization.

669439437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701.

The product of its digits is 2939328, while the sum is 51.

The square root of 669439437 is about 25873.5277262301. The cubic root of 669439437 is about 874.7899085261.

The spelling of 669439437 in words is "six hundred sixty-nine million, four hundred thirty-nine thousand, four hundred thirty-seven".