664848715 has 4 divisors (see below), whose sum is σ = 797818464. Its totient is φ = 531878968.

The previous prime is 664848707. The next prime is 664848731. The reversal of 664848715 is 517848466.

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

It is a cyclic number.

It is not a de Polignac number, because 664848715 - 2³ = 664848707 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 66484867 + ... + 66484876.

It is an arithmetic number, because the mean of its divisors is an integer number (199454616).

Almost surely, 2^664848715 is an apocalyptic number.

664848715 is a deficient number, since it is larger than the sum of its proper divisors (132969749).

664848715 is a wasteful number, since it uses less digits than its factorization.

664848715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132969748.

The product of its digits is 1290240, while the sum is 49.

The square root of 664848715 is about 25784.6604592731. The cubic root of 664848715 is about 872.7856783254.

The spelling of 664848715 in words is "six hundred sixty-four million, eight hundred forty-eight thousand, seven hundred fifteen".