664108798 has 4 divisors (see below), whose sum is σ = 996163200. Its totient is φ = 332054398.

The previous prime is 664108777. The next prime is 664108807. The reversal of 664108798 is 897801466.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166027198 + ... + 166027201.

It is an arithmetic number, because the mean of its divisors is an integer number (249040800).

Almost surely, 2^664108798 is an apocalyptic number.

664108798 is a deficient number, since it is larger than the sum of its proper divisors (332054402).

664108798 is a wasteful number, since it uses less digits than its factorization.

664108798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332054401.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 664108798 is about 25770.3084576029. The cubic root of 664108798 is about 872.4617807414.

The spelling of 664108798 in words is "six hundred sixty-four million, one hundred eight thousand, seven hundred ninety-eight".