669483940 has 12 divisors (see below), whose sum is σ = 1405916316. Its totient is φ = 267793568.

The previous prime is 669483907. The next prime is 669483979. The reversal of 669483940 is 49384966.

It can be written as a sum of positive squares in 2 ways, for example, as 386436964 + 283046976 = 19658^2 + 16824^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16737079 + ... + 16737118.

It is an arithmetic number, because the mean of its divisors is an integer number (117159693).

Almost surely, 2^669483940 is an apocalyptic number.

It is an amenable number.

669483940 is an abundant number, since it is smaller than the sum of its proper divisors (736432376).

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

669483940 is a wasteful number, since it uses less digits than its factorization.

669483940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33474206 (or 33474204 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 669483940 is about 25874.3877222245. The cubic root of 669483940 is about 874.8092928600.

The spelling of 669483940 in words is "six hundred sixty-nine million, four hundred eighty-three thousand, nine hundred forty".