64664465611 has 6 divisors (see below), whose sum is σ = 66971165612. Its totient is φ = 62434655640.

The previous prime is 64664465597. The next prime is 64664465617. The reversal of 64664465611 is 11656446646.

It is not a de Polignac number, because 64664465611 - 2²⁵ = 64630911179 is a prime.

It is a super-2 number, since 2×64664465611² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64664465617) 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 5 ways as a sum of consecutive naturals, for example, 38444145 + ... + 38445826.

Almost surely, 2^64664465611 is an apocalyptic number.

64664465611 is a deficient number, since it is larger than the sum of its proper divisors (2306700001).

64664465611 is an equidigital number, since it uses as much as digits as its factorization.

64664465611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76890029 (or 76890000 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

The spelling of 64664465611 in words is "sixty-four billion, six hundred sixty-four million, four hundred sixty-five thousand, six hundred eleven".