66001510161 has 6 divisors (see below), whose sum is σ = 95335514690. Its totient is φ = 44001006768.

The previous prime is 66001510153. The next prime is 66001510207. The reversal of 66001510161 is 16101510066.

66001510161 is a `hidden beast` number, since 6 + 600 + 1 + 51 + 0 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40067628561 + 25933881600 = 200169^2 + 161040^2 .

It is not a de Polignac number, because 66001510161 - 2³ = 66001510153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66001510121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3666750556 + ... + 3666750573.

Almost surely, 2^66001510161 is an apocalyptic number.

It is an amenable number.

66001510161 is a deficient number, since it is larger than the sum of its proper divisors (29334004529).

66001510161 is a wasteful number, since it uses less digits than its factorization.

66001510161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333501135 (or 7333501132 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The spelling of 66001510161 in words is "sixty-six billion, one million, five hundred ten thousand, one hundred sixty-one".