664494486 has 32 divisors (see below), whose sum is σ = 1444070400. Its totient is φ = 203070240.

The previous prime is 664494473. The next prime is 664494499. The reversal of 664494486 is 684494466.

It is an interprime number because it is at equal distance from previous prime (664494473) and next prime (664494499).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90481 + ... + 97548.

It is an arithmetic number, because the mean of its divisors is an integer number (45127200).

Almost surely, 2^664494486 is an apocalyptic number.

664494486 is an abundant number, since it is smaller than the sum of its proper divisors (779575914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664494486 is a wasteful number, since it uses less digits than its factorization.

664494486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188084.

The product of its digits is 3981312, while the sum is 51.

The square root of 664494486 is about 25777.7905569892. The cubic root of 664494486 is about 872.6306451001.

The spelling of 664494486 in words is "six hundred sixty-four million, four hundred ninety-four thousand, four hundred eighty-six".