66166161051 has 32 divisors (see below), whose sum is σ = 95621011200. Its totient is φ = 40554691200.

The previous prime is 66166161041. The next prime is 66166161073. The reversal of 66166161051 is 15016166166.

It is not a de Polignac number, because 66166161051 - 2⁹ = 66166160539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66166161001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 780076 + ... + 860726.

It is an arithmetic number, because the mean of its divisors is an integer number (2988156600).

Almost surely, 2^66166161051 is an apocalyptic number.

66166161051 is a deficient number, since it is larger than the sum of its proper divisors (29454850149).

66166161051 is a wasteful number, since it uses less digits than its factorization.

66166161051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81099.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 66166161051 in words is "sixty-six billion, one hundred sixty-six million, one hundred sixty-one thousand, fifty-one".