66658466485666 has 16 divisors (see below), whose sum is σ = 109080395974368. Its totient is φ = 30298495903200.

The previous prime is 66658466485661. The next prime is 66658466485717.

66658466485666 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 66658466485666.

It is not an unprimeable number, because it can be changed into a prime (66658466485661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39507120 + ... + 41159803.

It is an arithmetic number, because the mean of its divisors is an integer number (6817524748398).

Almost surely, 2^{66658466485666} is an apocalyptic number.

66658466485666 is a deficient number, since it is larger than the sum of its proper divisors (42421929488702).

66658466485666 is a wasteful number, since it uses less digits than its factorization.

66658466485666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80704497.

The product of its digits is 42998169600, while the sum is 82.

The spelling of 66658466485666 in words is "sixty-six trillion, six hundred fifty-eight billion, four hundred sixty-six million, four hundred eighty-five thousand, six hundred sixty-six".