64668275975 has 24 divisors (see below), whose sum is σ = 80769570000. Its totient is φ = 51360215040.

The previous prime is 64668275923. The next prime is 64668275999. The reversal of 64668275975 is 57957286646.

64668275975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64668275975 - 2¹² = 64668271879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9901511 + ... + 9908039.

It is an arithmetic number, because the mean of its divisors is an integer number (3365398750).

Almost surely, 2^64668275975 is an apocalyptic number.

64668275975 is a deficient number, since it is larger than the sum of its proper divisors (16101294025).

64668275975 is a wasteful number, since it uses less digits than its factorization.

64668275975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9347 (or 9342 counting only the distinct ones).

The product of its digits is 152409600, while the sum is 65.

The spelling of 64668275975 in words is "sixty-four billion, six hundred sixty-eight million, two hundred seventy-five thousand, nine hundred seventy-five".