66414675564 has 18 divisors (see below), whose sum is σ = 167881541100. Its totient is φ = 22138225176.

The previous prime is 66414675563. The next prime is 66414675581. The reversal of 66414675564 is 46557641466.

66414675564 is a `hidden beast` number, since 6 + 6 + 4 + 1 + 4 + 6 + 75 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 66414675564.

It is not an unprimeable number, because it can be changed into a prime (66414675563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 922426014 + ... + 922426085.

Almost surely, 2^66414675564 is an apocalyptic number.

It is an amenable number.

66414675564 is an abundant number, since it is smaller than the sum of its proper divisors (101466865536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66414675564 is a wasteful number, since it uses less digits than its factorization.

66414675564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844852109 (or 1844852104 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 54.

The spelling of 66414675564 in words is "sixty-six billion, four hundred fourteen million, six hundred seventy-five thousand, five hundred sixty-four".