66466426563 has 24 divisors (see below), whose sum is σ = 102483463680. Its totient is φ = 41387537520.

The previous prime is 66466426561. The next prime is 66466426567. The reversal of 66466426563 is 36562466466.

66466426563 is a `hidden beast` number, since 66 + 466 + 4 + 2 + 65 + 63 = 666.

It is not a de Polignac number, because 66466426563 - 2¹ = 66466426561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66466426561) 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, 2725131 + ... + 2749412.

It is an arithmetic number, because the mean of its divisors is an integer number (4270144320).

Almost surely, 2^66466426563 is an apocalyptic number.

66466426563 is a deficient number, since it is larger than the sum of its proper divisors (36017037117).

66466426563 is a wasteful number, since it uses less digits than its factorization.

66466426563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474639 (or 5474636 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 54.

The spelling of 66466426563 in words is "sixty-six billion, four hundred sixty-six million, four hundred twenty-six thousand, five hundred sixty-three".