66173271740 has 24 divisors (see below), whose sum is σ = 139004213712. Its totient is φ = 26461624320.

The previous prime is 66173271721. The next prime is 66173271751. The reversal of 66173271740 is 4717237166.

It is a junction number, because it is equal to n+sod(n) for n = 66173271691 and 66173271700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409406 + ... + 547685.

It is an arithmetic number, because the mean of its divisors is an integer number (5791842238).

Almost surely, 2^66173271740 is an apocalyptic number.

It is an amenable number.

66173271740 is an abundant number, since it is smaller than the sum of its proper divisors (72830941972).

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

66173271740 is a wasteful number, since it uses less digits than its factorization.

66173271740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960557 (or 960555 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 44.

The spelling of 66173271740 in words is "sixty-six billion, one hundred seventy-three million, two hundred seventy-one thousand, seven hundred forty".