669444930 has 96 divisors (see below), whose sum is σ = 2170067328. Its totient is φ = 139104000.

The previous prime is 669444929. The next prime is 669444943. The reversal of 669444930 is 39444966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 41371 + ... + 55230.

It is an arithmetic number, because the mean of its divisors is an integer number (22604868).

Almost surely, 2^669444930 is an apocalyptic number.

669444930 is an abundant number, since it is smaller than the sum of its proper divisors (1500622398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669444930 is a wasteful number, since it uses less digits than its factorization.

669444930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96632 (or 96629 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 669444930 is about 25873.6338769799. The cubic root of 669444930 is about 874.7923011786.

The spelling of 669444930 in words is "six hundred sixty-nine million, four hundred forty-four thousand, nine hundred thirty".