669044375 has 10 divisors (see below), whose sum is σ = 836038632. Its totient is φ = 535235000.

The previous prime is 669044371. The next prime is 669044393. The reversal of 669044375 is 573440966.

It is not a de Polignac number, because 669044375 - 2² = 669044371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669044371) 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 9 ways as a sum of consecutive naturals, for example, 534611 + ... + 535860.

Almost surely, 2^669044375 is an apocalyptic number.

669044375 is a deficient number, since it is larger than the sum of its proper divisors (166994257).

669044375 is an equidigital number, since it uses as much as digits as its factorization.

669044375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070491 (or 1070476 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 669044375 is about 25865.8921168399. The cubic root of 669044375 is about 874.6177922563.

The spelling of 669044375 in words is "six hundred sixty-nine million, forty-four thousand, three hundred seventy-five".