66200550171 has 16 divisors (see below), whose sum is σ = 102382658304. Its totient is φ = 37264274784.

The previous prime is 66200550167. The next prime is 66200550179. The reversal of 66200550171 is 17105500266.

It is not a de Polignac number, because 66200550171 - 2² = 66200550167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66200550179) 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, 23524020 + ... + 23526833.

It is an arithmetic number, because the mean of its divisors is an integer number (6398916144).

Almost surely, 2^66200550171 is an apocalyptic number.

66200550171 is a deficient number, since it is larger than the sum of its proper divisors (36182108133).

66200550171 is a wasteful number, since it uses less digits than its factorization.

66200550171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47050930.

The product of its (nonzero) digits is 12600, while the sum is 33.

The spelling of 66200550171 in words is "sixty-six billion, two hundred million, five hundred fifty thousand, one hundred seventy-one".