669651132 has 12 divisors (see below), whose sum is σ = 1562519336. Its totient is φ = 223217040.

The previous prime is 669651127. The next prime is 669651133. The reversal of 669651132 is 231156966.

669651132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669651133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27902119 + ... + 27902142.

Almost surely, 2^669651132 is an apocalyptic number.

It is an amenable number.

669651132 is an abundant number, since it is smaller than the sum of its proper divisors (892868204).

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

669651132 is a wasteful number, since it uses less digits than its factorization.

669651132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55804268 (or 55804266 counting only the distinct ones).

The product of its digits is 58320, while the sum is 39.

The square root of 669651132 is about 25877.6183602742. The cubic root of 669651132 is about 874.8821096137.

The spelling of 669651132 in words is "six hundred sixty-nine million, six hundred fifty-one thousand, one hundred thirty-two".