664152716 has 24 divisors (see below), whose sum is σ = 1190629440. Its totient is φ = 323990352.

The previous prime is 664152691. The next prime is 664152743. The reversal of 664152716 is 617251466.

It is a self number, because there is not a number n which added to its sum of digits gives 664152716.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215015 + ... + 218081.

It is an arithmetic number, because the mean of its divisors is an integer number (49609560).

Almost surely, 2^664152716 is an apocalyptic number.

It is an amenable number.

664152716 is a deficient number, since it is larger than the sum of its proper divisors (526476724).

664152716 is a wasteful number, since it uses less digits than its factorization.

664152716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373 (or 4371 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 664152716 is about 25771.1605481787. The cubic root of 664152716 is about 872.4810124958.

The spelling of 664152716 in words is "six hundred sixty-four million, one hundred fifty-two thousand, seven hundred sixteen".