669015732 has 96 divisors (see below), whose sum is σ = 2013419520. Its totient is φ = 167771520.

The previous prime is 669015713. The next prime is 669015749. The reversal of 669015732 is 237510966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14313 + ... + 39279.

It is an arithmetic number, because the mean of its divisors is an integer number (20973120).

Almost surely, 2^669015732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669015732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006709760).

669015732 is an abundant number, since it is smaller than the sum of its proper divisors (1344403788).

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

669015732 is a wasteful number, since it uses less digits than its factorization.

669015732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25021 (or 25019 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 669015732 is about 25865.3384280972. The cubic root of 669015732 is about 874.6053107548.

It can be divided in two parts, 6690 and 15732, that added together give a palindrome (22422).

The spelling of 669015732 in words is "six hundred sixty-nine million, fifteen thousand, seven hundred thirty-two".