664801611288 has 16 divisors (see below), whose sum is σ = 1662004028280. Its totient is φ = 221600537088.

The previous prime is 664801611269. The next prime is 664801611289. The reversal of 664801611288 is 882116108466.

It is a super-2 number, since 2×664801611288² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664801611288.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664801611289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13850033545 + ... + 13850033592.

Almost surely, 2^664801611288 is an apocalyptic number.

It is an amenable number.

664801611288 is an abundant number, since it is smaller than the sum of its proper divisors (997202416992).

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

664801611288 is a wasteful number, since it uses less digits than its factorization.

664801611288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27700067146 (or 27700067142 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The spelling of 664801611288 in words is "six hundred sixty-four billion, eight hundred one million, six hundred eleven thousand, two hundred eighty-eight".