664971523862 has 8 divisors (see below), whose sum is σ = 997470014376. Its totient is φ = 332481519072.

The previous prime is 664971523859. The next prime is 664971523907. The reversal of 664971523862 is 268325179466.

664971523862 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 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, 1921763 + ... + 2241230.

It is an arithmetic number, because the mean of its divisors is an integer number (124683751797).

Almost surely, 2^664971523862 is an apocalyptic number.

664971523862 is a deficient number, since it is larger than the sum of its proper divisors (332498490514).

664971523862 is a wasteful number, since it uses less digits than its factorization.

664971523862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242862.

The product of its digits is 26127360, while the sum is 59.

The spelling of 664971523862 in words is "six hundred sixty-four billion, nine hundred seventy-one million, five hundred twenty-three thousand, eight hundred sixty-two".