66088398764 has 6 divisors (see below), whose sum is σ = 115654697844. Its totient is φ = 33044199380.

The previous prime is 66088398757. The next prime is 66088398793. The reversal of 66088398764 is 46789388066.

It is a self number, because there is not a number n which added to its sum of digits gives 66088398764.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8261049842 + ... + 8261049849.

It is an arithmetic number, because the mean of its divisors is an integer number (19275782974).

Almost surely, 2^66088398764 is an apocalyptic number.

It is an amenable number.

66088398764 is a deficient number, since it is larger than the sum of its proper divisors (49566299080).

66088398764 is a wasteful number, since it uses less digits than its factorization.

66088398764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16522099695 (or 16522099693 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 65.

The spelling of 66088398764 in words is "sixty-six billion, eighty-eight million, three hundred ninety-eight thousand, seven hundred sixty-four".