64664477183 has 4 divisors (see below), whose sum is σ = 64742669640. Its totient is φ = 64586284728.

The previous prime is 64664477173. The next prime is 64664477191. The reversal of 64664477183 is 38177446646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64664477183 - 2⁴ = 64664477167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64664477173) 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, 39094988 + ... + 39096641.

It is an arithmetic number, because the mean of its divisors is an integer number (16185667410).

Almost surely, 2^64664477183 is an apocalyptic number.

64664477183 is a deficient number, since it is larger than the sum of its proper divisors (78192457).

64664477183 is an equidigital number, since it uses as much as digits as its factorization.

64664477183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78192456.

The product of its digits is 16257024, while the sum is 56.

The spelling of 64664477183 in words is "sixty-four billion, six hundred sixty-four million, four hundred seventy-seven thousand, one hundred eighty-three".