66732443684 has 12 divisors (see below), whose sum is σ = 117525610524. Its totient is φ = 33153697824.

The previous prime is 66732443641. The next prime is 66732443699. The reversal of 66732443684 is 48634423766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9472739584 + 57259704100 = 97328^2 + 239290^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53130299 + ... + 53131554.

It is an arithmetic number, because the mean of its divisors is an integer number (9793800877).

Almost surely, 2^66732443684 is an apocalyptic number.

It is an amenable number.

66732443684 is a deficient number, since it is larger than the sum of its proper divisors (50793166840).

66732443684 is a wasteful number, since it uses less digits than its factorization.

66732443684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106262014 (or 106262012 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 53.

The spelling of 66732443684 in words is "sixty-six billion, seven hundred thirty-two million, four hundred forty-three thousand, six hundred eighty-four".