166969698485 has 4 divisors (see below), whose sum is σ = 200363638188. Its totient is φ = 133575758784.

The previous prime is 166969698443. The next prime is 166969698499. The reversal of 166969698485 is 584896969661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 584896969661 = 77549 ⋅7542289.

It can be written as a sum of positive squares in 2 ways, for example, as 31974446596 + 134995251889 = 178814^2 + 367417^2 .

It is a cyclic number.

It is not a de Polignac number, because 166969698485 - 2⁶ = 166969698421 is a prime.

It is a super-2 number, since 2×166969698485² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16696969844 + ... + 16696969853.

It is an arithmetic number, because the mean of its divisors is an integer number (50090909547).

Almost surely, 2^166969698485 is an apocalyptic number.

It is an amenable number.

166969698485 is a deficient number, since it is larger than the sum of its proper divisors (33393939703).

166969698485 is an equidigital number, since it uses as much as digits as its factorization.

166969698485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33393939702.

The product of its digits is 1209323520, while the sum is 77.

The spelling of 166969698485 in words is "one hundred sixty-six billion, nine hundred sixty-nine million, six hundred ninety-eight thousand, four hundred eighty-five".