66182054399 has 32 divisors (see below), whose sum is σ = 72145920000. Its totient is φ = 60509286144.

The previous prime is 66182054377. The next prime is 66182054413. The reversal of 66182054399 is 99345028166.

It is a cyclic number.

It is not a de Polignac number, because 66182054399 - 2⁸ = 66182054143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66182054399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66182054359) 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 31 ways as a sum of consecutive naturals, for example, 21704627 + ... + 21707675.

It is an arithmetic number, because the mean of its divisors is an integer number (2254560000).

Almost surely, 2^66182054399 is an apocalyptic number.

66182054399 is a deficient number, since it is larger than the sum of its proper divisors (5963865601).

66182054399 is a wasteful number, since it uses less digits than its factorization.

66182054399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 66182054399 in words is "sixty-six billion, one hundred eighty-two million, fifty-four thousand, three hundred ninety-nine".