664072859 has 8 divisors (see below), whose sum is σ = 709847712. Its totient is φ = 619706560.

The previous prime is 664072847. The next prime is 664072873. The reversal of 664072859 is 958270466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664072859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664072889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351164 + ... + 353049.

It is an arithmetic number, because the mean of its divisors is an integer number (88730964).

Almost surely, 2^664072859 is an apocalyptic number.

664072859 is a deficient number, since it is larger than the sum of its proper divisors (45774853).

664072859 is a wasteful number, since it uses less digits than its factorization.

664072859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704277.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 664072859 is about 25769.6111534497. The cubic root of 664072859 is about 872.4460423716.

The spelling of 664072859 in words is "six hundred sixty-four million, seventy-two thousand, eight hundred fifty-nine".