669637122 has 32 divisors (see below), whose sum is σ = 1669745664. Its totient is φ = 173931600.

The previous prime is 669637109. The next prime is 669637181. The reversal of 669637122 is 221736966.

669637122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724254 + ... + 725177.

It is an arithmetic number, because the mean of its divisors is an integer number (52179552).

Almost surely, 2^669637122 is an apocalyptic number.

669637122 is an abundant number, since it is smaller than the sum of its proper divisors (1000108542).

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

669637122 is a wasteful number, since it uses less digits than its factorization.

669637122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449454.

The product of its digits is 163296, while the sum is 42.

The square root of 669637122 is about 25877.3476616132. The cubic root of 669637122 is about 874.8760083354.

The spelling of 669637122 in words is "six hundred sixty-nine million, six hundred thirty-seven thousand, one hundred twenty-two".