66358198716 has 24 divisors (see below), whose sum is σ = 154909133904. Its totient is φ = 22108922880.

The previous prime is 66358198693. The next prime is 66358198727. The reversal of 66358198716 is 61789185366.

It is a self number, because there is not a number n which added to its sum of digits gives 66358198716.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1283175 + ... + 1333886.

It is an arithmetic number, because the mean of its divisors is an integer number (6454547246).

Almost surely, 2^66358198716 is an apocalyptic number.

It is an amenable number.

66358198716 is an abundant number, since it is smaller than the sum of its proper divisors (88550935188).

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

66358198716 is a wasteful number, since it uses less digits than its factorization.

66358198716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619181 (or 2619179 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The spelling of 66358198716 in words is "sixty-six billion, three hundred fifty-eight million, one hundred ninety-eight thousand, seven hundred sixteen".