664240317 has 48 divisors (see below), whose sum is σ = 1014289920. Its totient is φ = 384082560.

The previous prime is 664240301. The next prime is 664240319. The reversal of 664240317 is 713042466.

It is a happy number.

It is not a de Polignac number, because 664240317 - 2⁴ = 664240301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664240319) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1386484 + ... + 1386962.

It is an arithmetic number, because the mean of its divisors is an integer number (21131040).

Almost surely, 2^664240317 is an apocalyptic number.

It is an amenable number.

664240317 is a deficient number, since it is larger than the sum of its proper divisors (350049603).

664240317 is a wasteful number, since it uses less digits than its factorization.

664240317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 664240317 is about 25772.8600857569. The cubic root of 664240317 is about 872.5193705658.

The spelling of 664240317 in words is "six hundred sixty-four million, two hundred forty thousand, three hundred seventeen".