669539180 has 12 divisors (see below), whose sum is σ = 1406032320. Its totient is φ = 267815664.

The previous prime is 669539093. The next prime is 669539191. The reversal of 669539180 is 81935966.

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 3 ways as a sum of consecutive naturals, for example, 16738460 + ... + 16738499.

It is an arithmetic number, because the mean of its divisors is an integer number (117169360).

Almost surely, 2^669539180 is an apocalyptic number.

It is an amenable number.

669539180 is an abundant number, since it is smaller than the sum of its proper divisors (736493140).

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

669539180 is a wasteful number, since it uses less digits than its factorization.

669539180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33476968 (or 33476966 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 669539180 is about 25875.4551650787. The cubic root of 669539180 is about 874.8333527532.

The spelling of 669539180 in words is "six hundred sixty-nine million, five hundred thirty-nine thousand, one hundred eighty".