669218132 has 24 divisors (see below), whose sum is σ = 1290777600. Its totient is φ = 301052160.

The previous prime is 669218119. The next prime is 669218161. The reversal of 669218132 is 231812966.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 74132 + ... + 82667.

It is an arithmetic number, because the mean of its divisors is an integer number (53782400).

Almost surely, 2^669218132 is an apocalyptic number.

It is an amenable number.

669218132 is a deficient number, since it is larger than the sum of its proper divisors (621559468).

669218132 is a wasteful number, since it uses less digits than its factorization.

669218132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156911 (or 156909 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 669218132 is about 25869.2507042628. The cubic root of 669218132 is about 874.6935011406.

The spelling of 669218132 in words is "six hundred sixty-nine million, two hundred eighteen thousand, one hundred thirty-two".