64331660663013 has 4 divisors (see below), whose sum is σ = 85775547550688. Its totient is φ = 42887773775340.

The previous prime is 64331660662999. The next prime is 64331660663027. The reversal of 64331660663013 is 31036606613346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (64331660662999) and next prime (64331660663027).

It is not a de Polignac number, because 64331660663013 - 2⁶ = 64331660662949 is a prime.

It is a super-2 number, since 2×64331660663013² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64331660661013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10721943443833 + ... + 10721943443838.

It is an arithmetic number, because the mean of its divisors is an integer number (21443886887672).

Almost surely, 2^{64331660663013} is an apocalyptic number.

It is an amenable number.

64331660663013 is a deficient number, since it is larger than the sum of its proper divisors (21443886887675).

64331660663013 is a wasteful number, since it uses less digits than its factorization.

64331660663013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21443886887674.

The product of its (nonzero) digits is 2519424, while the sum is 48.

The spelling of 64331660663013 in words is "sixty-four trillion, three hundred thirty-one billion, six hundred sixty million, six hundred sixty-three thousand, thirteen".