66332981295 has 80 divisors (see below), whose sum is σ = 141803481600. Its totient is φ = 29005200576.

The previous prime is 66332981293. The next prime is 66332981329. The reversal of 66332981295 is 59218923366.

66332981295 is a `hidden beast` number, since 6 + 63 + 3 + 298 + 1 + 295 = 666.

It is not a de Polignac number, because 66332981295 - 2¹ = 66332981293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66332981293) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 443445 + ... + 573854.

It is an arithmetic number, because the mean of its divisors is an integer number (1772543520).

Almost surely, 2^66332981295 is an apocalyptic number.

66332981295 is an abundant number, since it is smaller than the sum of its proper divisors (75470500305).

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

66332981295 is a wasteful number, since it uses less digits than its factorization.

66332981295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017346 (or 1017337 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 66332981295 in words is "sixty-six billion, three hundred thirty-two million, nine hundred eighty-one thousand, two hundred ninety-five".