664989862 has 8 divisors (see below), whose sum is σ = 1001459592. Its totient is φ = 331170000.

The previous prime is 664989821. The next prime is 664989877. The reversal of 664989862 is 268989466.

664989862 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 664989797 and 664989806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661839 + ... + 662842.

It is an arithmetic number, because the mean of its divisors is an integer number (125182449).

Almost surely, 2^664989862 is an apocalyptic number.

664989862 is a deficient number, since it is larger than the sum of its proper divisors (336469730).

664989862 is a wasteful number, since it uses less digits than its factorization.

664989862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324934.

The product of its digits is 8957952, while the sum is 58.

The square root of 664989862 is about 25787.3973483173. The cubic root of 664989862 is about 872.8474379210.

The spelling of 664989862 in words is "six hundred sixty-four million, nine hundred eighty-nine thousand, eight hundred sixty-two".