66186676218 has 16 divisors (see below), whose sum is σ = 142555918176. Its totient is φ = 20365131120.

The previous prime is 66186676211. The next prime is 66186676243. The reversal of 66186676218 is 81267668166.

It is a super-2 number, since 2×66186676218² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66186676211) by changing a digit.

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, 424273488 + ... + 424273643.

It is an arithmetic number, because the mean of its divisors is an integer number (8909744886).

Almost surely, 2^66186676218 is an apocalyptic number.

66186676218 is an abundant number, since it is smaller than the sum of its proper divisors (76369241958).

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

66186676218 is a wasteful number, since it uses less digits than its factorization.

66186676218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848547149.

The product of its digits is 6967296, while the sum is 57.

The spelling of 66186676218 in words is "sixty-six billion, one hundred eighty-six million, six hundred seventy-six thousand, two hundred eighteen".