664347086 has 16 divisors (see below), whose sum is σ = 1085238000. Its totient is φ = 303175488.

The previous prime is 664347017. The next prime is 664347163. The reversal of 664347086 is 680743466.

It is a happy number.

664347086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 141236 + ... + 145863.

It is an arithmetic number, because the mean of its divisors is an integer number (67827375).

Almost surely, 2^664347086 is an apocalyptic number.

664347086 is a deficient number, since it is larger than the sum of its proper divisors (420890914).

664347086 is a wasteful number, since it uses less digits than its factorization.

664347086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287203.

The product of its (nonzero) digits is 580608, while the sum is 44.

The square root of 664347086 is about 25774.9313481142. The cubic root of 664347086 is about 872.5661172163.

The spelling of 664347086 in words is "six hundred sixty-four million, three hundred forty-seven thousand, eighty-six".