664286804 has 6 divisors (see below), whose sum is σ = 1162501914. Its totient is φ = 332143400.

The previous prime is 664286803. The next prime is 664286813. The reversal of 664286804 is 408682466.

It can be written as a sum of positive squares in only one way, i.e., 618019600 + 46267204 = 24860^2 + 6802^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664286801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83035847 + ... + 83035854.

It is an arithmetic number, because the mean of its divisors is an integer number (193750319).

Almost surely, 2^664286804 is an apocalyptic number.

It is an amenable number.

664286804 is a deficient number, since it is larger than the sum of its proper divisors (498215110).

664286804 is a wasteful number, since it uses less digits than its factorization.

664286804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166071705 (or 166071703 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 664286804 is about 25773.7619295283. The cubic root of 664286804 is about 872.5397245756.

The spelling of 664286804 in words is "six hundred sixty-four million, two hundred eighty-six thousand, eight hundred four".