66149688694166 has 64 divisors (see below), whose sum is σ = 124930119315456. Its totient is φ = 25518186151200.

The previous prime is 66149688694157. The next prime is 66149688694171.

66149688694166 is nontrivially palindromic in base 10.

66149688694166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96909821 + ... + 97590023.

It is an arithmetic number, because the mean of its divisors is an integer number (1952033114304).

Almost surely, 2^{66149688694166} is an apocalyptic number.

66149688694166 is a deficient number, since it is larger than the sum of its proper divisors (58780430621290).

66149688694166 is a wasteful number, since it uses less digits than its factorization.

66149688694166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686457.

The product of its digits is 3869835264, while the sum is 80.

The spelling of 66149688694166 in words is "sixty-six trillion, one hundred forty-nine billion, six hundred eighty-eight million, six hundred ninety-four thousand, one hundred sixty-six".