66170194708 has 24 divisors (see below), whose sum is σ = 122712607080. Its totient is φ = 31165102080.

The previous prime is 66170194703. The next prime is 66170194709. The reversal of 66170194708 is 80749107166.

It can be written as a sum of positive squares in 4 ways, for example, as 4580853124 + 61589341584 = 67682^2 + 248172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66170194703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6951741 + ... + 6961252.

It is an arithmetic number, because the mean of its divisors is an integer number (5113025295).

Almost surely, 2^66170194708 is an apocalyptic number.

It is an amenable number.

66170194708 is a deficient number, since it is larger than the sum of its proper divisors (56542412372).

66170194708 is a wasteful number, since it uses less digits than its factorization.

66170194708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13913067 (or 13913065 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 66170194708 in words is "sixty-six billion, one hundred seventy million, one hundred ninety-four thousand, seven hundred eight".