166185968026 has 32 divisors (see below), whose sum is σ = 284277945168. Its totient is φ = 72181186560.

The previous prime is 166185967999. The next prime is 166185968093. The reversal of 166185968026 is 620869581661.

It can be written as a sum of positive squares in 8 ways, for example, as 18269577225 + 147916390801 = 135165^2 + 384599^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5480266 + ... + 5510506.

Almost surely, 2^166185968026 is an apocalyptic number.

166185968026 is a deficient number, since it is larger than the sum of its proper divisors (118091977142).

166185968026 is a wasteful number, since it uses less digits than its factorization.

166185968026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42706.

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 166185968026 in words is "one hundred sixty-six billion, one hundred eighty-five million, nine hundred sixty-eight thousand, twenty-six".