66186803346 has 32 divisors (see below), whose sum is σ = 138368539008. Its totient is φ = 21066439680.

The previous prime is 66186803321. The next prime is 66186803359. The reversal of 66186803346 is 64330868166.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335985 + ... + 495236.

It is an arithmetic number, because the mean of its divisors is an integer number (4324016844).

Almost surely, 2^66186803346 is an apocalyptic number.

66186803346 is an abundant number, since it is smaller than the sum of its proper divisors (72181735662).

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

66186803346 is a wasteful number, since it uses less digits than its factorization.

66186803346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831826.

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 66186803346 in words is "sixty-six billion, one hundred eighty-six million, eight hundred three thousand, three hundred forty-six".