664351255 has 4 divisors (see below), whose sum is σ = 797221512. Its totient is φ = 531481000.

The previous prime is 664351231. The next prime is 664351267. The reversal of 664351255 is 552153466.

664351255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 664351255 - 2²⁹ = 127480343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66435121 + ... + 66435130.

It is an arithmetic number, because the mean of its divisors is an integer number (199305378).

Almost surely, 2^664351255 is an apocalyptic number.

664351255 is a deficient number, since it is larger than the sum of its proper divisors (132870257).

664351255 is a wasteful number, since it uses less digits than its factorization.

664351255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132870256.

The product of its digits is 108000, while the sum is 37.

The square root of 664351255 is about 25775.0122211416. The cubic root of 664351255 is about 872.5679424271.

The spelling of 664351255 in words is "six hundred sixty-four million, three hundred fifty-one thousand, two hundred fifty-five".