66173271700 has 36 divisors (see below), whose sum is σ = 143726425920. Its totient is φ = 26445267040.

The previous prime is 66173271667. The next prime is 66173271701. The reversal of 66173271700 is 717237166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66173271701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189670 + ... + 410269.

It is an arithmetic number, because the mean of its divisors is an integer number (3992400720).

Almost surely, 2^66173271700 is an apocalyptic number.

It is an amenable number.

66173271700 is an abundant number, since it is smaller than the sum of its proper divisors (77553154220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66173271700 is a wasteful number, since it uses less digits than its factorization.

66173271700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601056 (or 601049 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 40.

The spelling of 66173271700 in words is "sixty-six billion, one hundred seventy-three million, two hundred seventy-one thousand, seven hundred".