64660054475 has 6 divisors (see below), whose sum is σ = 80178467580. Its totient is φ = 51728043560.

The previous prime is 64660054447. The next prime is 64660054507. The reversal of 64660054475 is 57445006646.

It is not a de Polignac number, because 64660054475 - 2²⁰ = 64659005899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1293201065 + ... + 1293201114.

It is an arithmetic number, because the mean of its divisors is an integer number (13363077930).

Almost surely, 2^64660054475 is an apocalyptic number.

64660054475 is a deficient number, since it is larger than the sum of its proper divisors (15518413105).

64660054475 is a wasteful number, since it uses less digits than its factorization.

64660054475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586402189 (or 2586402184 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 64660054475 in words is "sixty-four billion, six hundred sixty million, fifty-four thousand, four hundred seventy-five".