66572195712 has 256 divisors, whose sum is σ = 199101127680. Its totient is φ = 19534970880.

The previous prime is 66572195707. The next prime is 66572195719. The reversal of 66572195712 is 21759127566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66572195719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19255488 + ... + 19258944.

It is an arithmetic number, because the mean of its divisors is an integer number (777738780).

Almost surely, 2^66572195712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66572195712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99550563840).

66572195712 is an abundant number, since it is smaller than the sum of its proper divisors (132528931968).

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

66572195712 is a wasteful number, since it uses less digits than its factorization.

66572195712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629 (or 3617 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 51.

The spelling of 66572195712 in words is "sixty-six billion, five hundred seventy-two million, one hundred ninety-five thousand, seven hundred twelve".