664702770153566 has 8 divisors (see below), whose sum is σ = 997058239288320. Its totient is φ = 332350023724128.

The previous prime is 664702770153563. The next prime is 664702770153571. The reversal of 664702770153566 is 665351077207466.

664702770153566 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 not an unprimeable number, because it can be changed into a prime (664702770153563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680065886 + ... + 681042593.

It is an arithmetic number, because the mean of its divisors is an integer number (124632279911040).

Almost surely, 2^{664702770153566} is an apocalyptic number.

664702770153566 is a deficient number, since it is larger than the sum of its proper divisors (332355469134754).

664702770153566 is a wasteful number, since it uses less digits than its factorization.

664702770153566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361352658.

The product of its (nonzero) digits is 266716800, while the sum is 65.

The spelling of 664702770153566 in words is "six hundred sixty-four trillion, seven hundred two billion, seven hundred seventy million, one hundred fifty-three thousand, five hundred sixty-six".