166181960769 has 32 divisors (see below), whose sum is σ = 256059605376. Its totient is φ = 94746808320.

The previous prime is 166181960767. The next prime is 166181960771. The reversal of 166181960769 is 967069181661.

166181960769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166181960767) and next prime (166181960771).

It is not a de Polignac number, because 166181960769 - 2¹ = 166181960767 is a prime.

It is a super-2 number, since 2×166181960769² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166181960761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1129549 + ... + 1268165.

It is an arithmetic number, because the mean of its divisors is an integer number (8001862668).

Almost surely, 2^166181960769 is an apocalyptic number.

It is an amenable number.

166181960769 is a deficient number, since it is larger than the sum of its proper divisors (89877644607).

166181960769 is a wasteful number, since it uses less digits than its factorization.

166181960769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140785.

The product of its (nonzero) digits is 5878656, while the sum is 60.

The spelling of 166181960769 in words is "one hundred sixty-six billion, one hundred eighty-one million, nine hundred sixty thousand, seven hundred sixty-nine".