64668664264 has 16 divisors (see below), whose sum is σ = 125165157120. Its totient is φ = 31291289040.

The previous prime is 64668664243. The next prime is 64668664267. The reversal of 64668664264 is 46246686646.

It is a super-2 number, since 2×64668664264² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64668664199 and 64668664208.

It is not an unprimeable number, because it can be changed into a prime (64668664267) 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, 130380124 + ... + 130380619.

It is an arithmetic number, because the mean of its divisors is an integer number (7822822320).

Almost surely, 2^64668664264 is an apocalyptic number.

It is an amenable number.

64668664264 is a deficient number, since it is larger than the sum of its proper divisors (60496492856).

64668664264 is a wasteful number, since it uses less digits than its factorization.

64668664264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260760780 (or 260760776 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 58.

The spelling of 64668664264 in words is "sixty-four billion, six hundred sixty-eight million, six hundred sixty-four thousand, two hundred sixty-four".