669126216 has 64 divisors (see below), whose sum is σ = 1863751680. Its totient is φ = 198447680.

The previous prime is 669126209. The next prime is 669126229. The reversal of 669126216 is 612621966.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14556 + ... + 39371.

It is an arithmetic number, because the mean of its divisors is an integer number (29121120).

Almost surely, 2^669126216 is an apocalyptic number.

669126216 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

669126216 is an abundant number, since it is smaller than the sum of its proper divisors (1194625464).

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

669126216 is a wasteful number, since it uses less digits than its factorization.

669126216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53994 (or 53990 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 669126216 is about 25867.4740939273. The cubic root of 669126216 is about 874.6534534067.

The spelling of 669126216 in words is "six hundred sixty-nine million, one hundred twenty-six thousand, two hundred sixteen".