166941370369 has 2 divisors, whose sum is σ = 166941370370. Its totient is φ = 166941370368.

The previous prime is 166941370363. The next prime is 166941370399. The reversal of 166941370369 is 963073149661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166909017025 + 32353344 = 408545^2 + 5688^2 .

It is a cyclic number.

It is not a de Polignac number, because 166941370369 - 2⁷ = 166941370241 is a prime.

It is a super-2 number, since 2×166941370369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166941370363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83470685184 + 83470685185.

It is an arithmetic number, because the mean of its divisors is an integer number (83470685185).

Almost surely, 2^166941370369 is an apocalyptic number.

It is an amenable number.

166941370369 is a deficient number, since it is larger than the sum of its proper divisors (1).

166941370369 is an equidigital number, since it uses as much as digits as its factorization.

166941370369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 55.

The spelling of 166941370369 in words is "one hundred sixty-six billion, nine hundred forty-one million, three hundred seventy thousand, three hundred sixty-nine".