66246565172 has 12 divisors (see below), whose sum is σ = 115933725600. Its totient is φ = 33122643576.

The previous prime is 66246565169. The next prime is 66246565183. The reversal of 66246565172 is 27156564266.

It is a self number, because there is not a number n which added to its sum of digits gives 66246565172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133193 + ... + 387599.

It is an arithmetic number, because the mean of its divisors is an integer number (9661143800).

Almost surely, 2^66246565172 is an apocalyptic number.

It is an amenable number.

66246565172 is a deficient number, since it is larger than the sum of its proper divisors (49687160428).

66246565172 is a wasteful number, since it uses less digits than its factorization.

66246565172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319510 (or 319508 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

The spelling of 66246565172 in words is "sixty-six billion, two hundred forty-six million, five hundred sixty-five thousand, one hundred seventy-two".