166134663666536 has 8 divisors (see below), whose sum is σ = 311502494374770. Its totient is φ = 83067331833264.

The previous prime is 166134663666473. The next prime is 166134663666553. The reversal of 166134663666536 is 635666366431661.

It can be written as a sum of positive squares in only one way, i.e., 100146173377636 + 65988490288900 = 10007306^2 + 8123330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10383416479151 + ... + 10383416479166.

Almost surely, 2^{166134663666536} is an apocalyptic number.

It is an amenable number.

166134663666536 is a deficient number, since it is larger than the sum of its proper divisors (145367830708234).

166134663666536 is a wasteful number, since it uses less digits than its factorization.

166134663666536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20766832958323 (or 20766832958319 counting only the distinct ones).

The product of its digits is 906992640, while the sum is 68.

The spelling of 166134663666536 in words is "one hundred sixty-six trillion, one hundred thirty-four billion, six hundred sixty-three million, six hundred sixty-six thousand, five hundred thirty-six".