665132655 has 32 divisors (see below), whose sum is σ = 1170137088. Its totient is φ = 319939200.

The previous prime is 665132647. The next prime is 665132687. The reversal of 665132655 is 556231566.

It is not a de Polignac number, because 665132655 - 2³ = 665132647 is a prime.

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, 5085 + ... + 36825.

It is an arithmetic number, because the mean of its divisors is an integer number (36566784).

Almost surely, 2^665132655 is an apocalyptic number.

665132655 is a deficient number, since it is larger than the sum of its proper divisors (505004433).

665132655 is a wasteful number, since it uses less digits than its factorization.

665132655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31887.

The product of its digits is 162000, while the sum is 39.

The square root of 665132655 is about 25790.1658583267. The cubic root of 665132655 is about 872.9099088404.

The spelling of 665132655 in words is "six hundred sixty-five million, one hundred thirty-two thousand, six hundred fifty-five".