664075767 has 8 divisors (see below), whose sum is σ = 885591424. Its totient is φ = 442638648.

The previous prime is 664075759. The next prime is 664075781. The reversal of 664075767 is 767570466.

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

It is not a de Polignac number, because 664075767 - 2³ = 664075759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664075747) 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, 4248 + ... + 36690.

It is an arithmetic number, because the mean of its divisors is an integer number (110698928).

Almost surely, 2^664075767 is an apocalyptic number.

664075767 is a deficient number, since it is larger than the sum of its proper divisors (221515657).

664075767 is a wasteful number, since it uses less digits than its factorization.

664075767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39269.

The product of its (nonzero) digits is 1481760, while the sum is 48.

The square root of 664075767 is about 25769.6675764357. The cubic root of 664075767 is about 872.4473158611.

The spelling of 664075767 in words is "six hundred sixty-four million, seventy-five thousand, seven hundred sixty-seven".