665288832 has 64 divisors (see below), whose sum is σ = 1903124160. Its totient is φ = 204702720.

The previous prime is 665288831. The next prime is 665288839. The reversal of 665288832 is 238882566.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (665288831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61644 + ... + 71627.

It is an arithmetic number, because the mean of its divisors is an integer number (29736315).

Almost surely, 2^665288832 is an apocalyptic number.

It is an amenable number.

665288832 is an abundant number, since it is smaller than the sum of its proper divisors (1237835328).

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

665288832 is a wasteful number, since it uses less digits than its factorization.

665288832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133301 (or 133289 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 665288832 is about 25793.1935207721. The cubic root of 665288832 is about 872.9782249279.

The spelling of 665288832 in words is "six hundred sixty-five million, two hundred eighty-eight thousand, eight hundred thirty-two".