669537132 has 48 divisors (see below), whose sum is σ = 1759263744. Its totient is φ = 196344000.

The previous prime is 669537131. The next prime is 669537157. The reversal of 669537132 is 231735966.

It is a super-2 number, since 2×669537132² = 896559942253570848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (669537131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77719 + ... + 85902.

It is an arithmetic number, because the mean of its divisors is an integer number (36651328).

Almost surely, 2^669537132 is an apocalyptic number.

669537132 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

669537132 is an abundant number, since it is smaller than the sum of its proper divisors (1089726612).

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

669537132 is a wasteful number, since it uses less digits than its factorization.

669537132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163670 (or 163668 counting only the distinct ones).

The product of its digits is 204120, while the sum is 42.

The square root of 669537132 is about 25875.4155908654. The cubic root of 669537132 is about 874.8324607663.

The spelling of 669537132 in words is "six hundred sixty-nine million, five hundred thirty-seven thousand, one hundred thirty-two".