66172755304 has 16 divisors (see below), whose sum is σ = 124237829700. Its totient is φ = 33042667392.

The previous prime is 66172755269. The next prime is 66172755371. The reversal of 66172755304 is 40355727166.

It can be written as a sum of positive squares in 2 ways, for example, as 60909252804 + 5263502500 = 246798^2 + 72550^2 .

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 3 ways as a sum of consecutive naturals, for example, 5457349 + ... + 5469460.

Almost surely, 2^66172755304 is an apocalyptic number.

It is an amenable number.

66172755304 is a deficient number, since it is larger than the sum of its proper divisors (58065074396).

66172755304 is a wasteful number, since it uses less digits than its factorization.

66172755304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10927572 (or 10927568 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 66172755304 in words is "sixty-six billion, one hundred seventy-two million, seven hundred fifty-five thousand, three hundred four".