166161969586 has 8 divisors (see below), whose sum is σ = 249543611820. Its totient is φ = 82980765648.

The previous prime is 166161969563. The next prime is 166161969587. The reversal of 166161969586 is 685969161661.

166161969586 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 153722805625 + 12439163961 = 392075^2 + 111531^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×166161969586² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166161969587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50107501 + ... + 50110816.

Almost surely, 2^166161969586 is an apocalyptic number.

166161969586 is a deficient number, since it is larger than the sum of its proper divisors (83381642234).

166161969586 is a wasteful number, since it uses less digits than its factorization.

166161969586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100219148.

The product of its digits is 25194240, while the sum is 64.

The spelling of 166161969586 in words is "one hundred sixty-six billion, one hundred sixty-one million, nine hundred sixty-nine thousand, five hundred eighty-six".