66886770225864 has 32 divisors (see below), whose sum is σ = 172983026448000. Its totient is φ = 21526776624192.

The previous prime is 66886770225797. The next prime is 66886770225871. The reversal of 66886770225864 is 46852207768866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48050839984 + ... + 48050841375.

It is an arithmetic number, because the mean of its divisors is an integer number (5405719576500).

Almost surely, 2^{66886770225864} is an apocalyptic number.

It is an amenable number.

66886770225864 is an abundant number, since it is smaller than the sum of its proper divisors (106096256222136).

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

66886770225864 is a wasteful number, since it uses less digits than its factorization.

66886770225864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96101681397 (or 96101681393 counting only the distinct ones).

The product of its (nonzero) digits is 2601123840, while the sum is 75.

The spelling of 66886770225864 in words is "sixty-six trillion, eight hundred eighty-six billion, seven hundred seventy million, two hundred twenty-five thousand, eight hundred sixty-four".