166266540129 has 16 divisors (see below), whose sum is σ = 221929436160. Its totient is φ = 110724069120.

The previous prime is 166266540113. The next prime is 166266540131. The reversal of 166266540129 is 921045662661.

It is not a de Polignac number, because 166266540129 - 2⁴ = 166266540113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166266540179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13625659 + ... + 13637855.

It is an arithmetic number, because the mean of its divisors is an integer number (13870589760).

Almost surely, 2^166266540129 is an apocalyptic number.

It is an amenable number.

166266540129 is a deficient number, since it is larger than the sum of its proper divisors (55662896031).

166266540129 is a wasteful number, since it uses less digits than its factorization.

166266540129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16760.

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 166266540129 in words is "one hundred sixty-six billion, two hundred sixty-six million, five hundred forty thousand, one hundred twenty-nine".