664670763 has 12 divisors (see below), whose sum is σ = 961922520. Its totient is φ = 442263456.

The previous prime is 664670761. The next prime is 664670801. The reversal of 664670763 is 367076466.

664670763 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664670763 - 2¹ = 664670761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664670761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65898 + ... + 75311.

It is an arithmetic number, because the mean of its divisors is an integer number (80160210).

Almost surely, 2^664670763 is an apocalyptic number.

664670763 is a deficient number, since it is larger than the sum of its proper divisors (297251757).

664670763 is a wasteful number, since it uses less digits than its factorization.

664670763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141738 (or 141735 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The square root of 664670763 is about 25781.2094945136. The cubic root of 664670763 is about 872.7078020544.

The spelling of 664670763 in words is "six hundred sixty-four million, six hundred seventy thousand, seven hundred sixty-three".