664265567 has 8 divisors (see below), whose sum is σ = 762477600. Its totient is φ = 566882784.

The previous prime is 664265557. The next prime is 664265573. The reversal of 664265567 is 765562466.

It is a happy number.

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 664265567 - 2²⁰ = 663216991 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 (664265557) 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, 205592 + ... + 208797.

It is an arithmetic number, because the mean of its divisors is an integer number (95309700).

Almost surely, 2^664265567 is an apocalyptic number.

664265567 is a deficient number, since it is larger than the sum of its proper divisors (98212033).

664265567 is a wasteful number, since it uses less digits than its factorization.

664265567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414625.

The product of its digits is 1814400, while the sum is 47.

The square root of 664265567 is about 25773.3499374839. The cubic root of 664265567 is about 872.5304262206.

The spelling of 664265567 in words is "six hundred sixty-four million, two hundred sixty-five thousand, five hundred sixty-seven".