66390562566272 has 96 divisors (see below), whose sum is σ = 153871584044220. Its totient is φ = 28450275065856.

The previous prime is 66390562566241. The next prime is 66390562566353. The reversal of 66390562566272 is 27266526509366.

It can be written as a sum of positive squares in 2 ways, for example, as 66253999798336 + 136562767936 = 8139656^2 + 369544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66390562566199 and 66390562566208.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63310088 + ... + 64350200.

Almost surely, 2^{66390562566272} 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 66390562566272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76935792022110).

66390562566272 is an abundant number, since it is smaller than the sum of its proper divisors (87481021477948).

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

66390562566272 is a wasteful number, since it uses less digits than its factorization.

66390562566272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050318 (or 1050299 counting only the distinct ones).

The product of its (nonzero) digits is 293932800, while the sum is 65.

The spelling of 66390562566272 in words is "sixty-six trillion, three hundred ninety billion, five hundred sixty-two million, five hundred sixty-six thousand, two hundred seventy-two".