665555132 has 48 divisors (see below), whose sum is σ = 1326344544. Its totient is φ = 289536000.

The previous prime is 665555129. The next prime is 665555159. The reversal of 665555132 is 231555566.

It is a congruent number.

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, 92132 + ... + 99092.

It is an arithmetic number, because the mean of its divisors is an integer number (27632178).

Almost surely, 2^665555132 is an apocalyptic number.

It is an amenable number.

665555132 is a deficient number, since it is larger than the sum of its proper divisors (660789412).

665555132 is a wasteful number, since it uses less digits than its factorization.

665555132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070 (or 7068 counting only the distinct ones).

The product of its digits is 135000, while the sum is 38.

The square root of 665555132 is about 25798.3552188894. The cubic root of 665555132 is about 873.0946871715.

The spelling of 665555132 in words is "six hundred sixty-five million, five hundred fifty-five thousand, one hundred thirty-two".