664933755 has 8 divisors (see below), whose sum is σ = 1063894032. Its totient is φ = 354631328.

The previous prime is 664933751. The next prime is 664933783. The reversal of 664933755 is 557339466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664933755 - 2² = 664933751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664933751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22164444 + ... + 22164473.

It is an arithmetic number, because the mean of its divisors is an integer number (132986754).

Almost surely, 2^664933755 is an apocalyptic number.

664933755 is a deficient number, since it is larger than the sum of its proper divisors (398960277).

664933755 is a wasteful number, since it uses less digits than its factorization.

664933755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44328925.

The product of its digits is 2041200, while the sum is 48.

The square root of 664933755 is about 25786.3094490080. The cubic root of 664933755 is about 872.8228890612.

It can be divided in two parts, 6649 and 33755, that added together give a palindrome (40404).

The spelling of 664933755 in words is "six hundred sixty-four million, nine hundred thirty-three thousand, seven hundred fifty-five".