166756745216 has 36 divisors (see below), whose sum is σ = 333512480322. Its totient is φ = 83378307072.

The previous prime is 166756745213. The next prime is 166756745227. The reversal of 166756745216 is 612547657661.

It can be written as a sum of positive squares in only one way, i.e., 165890031616 + 866713600 = 407296^2 + 29440^2 .

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (166756745213) by changing a digit.

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 as a sum of consecutive naturals, namely, 505055 + ... + 767198.

Almost surely, 2^166756745216 is an apocalyptic number.

166756745216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166756745216 is a deficient number, since it is larger than the sum of its proper divisors (166755735106).

166756745216 is an frugal number, since it uses more digits than its factorization.

166756745216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272287 (or 1272255 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 56.

The spelling of 166756745216 in words is "one hundred sixty-six billion, seven hundred fifty-six million, seven hundred forty-five thousand, two hundred sixteen".