66474625653 has 24 divisors (see below), whose sum is σ = 101533775616. Its totient is φ = 41840827200.

The previous prime is 66474625631. The next prime is 66474625727. The reversal of 66474625653 is 35652647466.

66474625653 is a `hidden beast` number, since 6 + 6 + 4 + 7 + 4 + 625 + 6 + 5 + 3 = 666.

It is not a de Polignac number, because 66474625653 - 2³⁰ = 65400883829 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66474625653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66474626653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2894175 + ... + 2917052.

It is an arithmetic number, because the mean of its divisors is an integer number (4230573984).

Almost surely, 2^66474625653 is an apocalyptic number.

It is an amenable number.

66474625653 is a deficient number, since it is larger than the sum of its proper divisors (35059149963).

66474625653 is a wasteful number, since it uses less digits than its factorization.

66474625653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811305 (or 5811302 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 54.

The spelling of 66474625653 in words is "sixty-six billion, four hundred seventy-four million, six hundred twenty-five thousand, six hundred fifty-three".