66604375247168 has 672 divisors, whose sum is σ = 161110212931584. Its totient is φ = 27202181529600.

The previous prime is 66604375247153. The next prime is 66604375247171. The reversal of 66604375247168 is 86174257340666.

It is a super-2 number, since 2×66604375247168² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 524443899521 + ... + 524443899647.

It is an arithmetic number, because the mean of its divisors is an integer number (239747340672).

Almost surely, 2^{66604375247168} is an apocalyptic number.

66604375247168 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66604375247168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80555106465792).

66604375247168 is an abundant number, since it is smaller than the sum of its proper divisors (94505837684416).

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

66604375247168 is an equidigital number, since it uses as much as digits as its factorization.

66604375247168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 65.

The spelling of 66604375247168 in words is "sixty-six trillion, six hundred four billion, three hundred seventy-five million, two hundred forty-seven thousand, one hundred sixty-eight".