66332981292 has 24 divisors (see below), whose sum is σ = 163881483696. Its totient is φ = 20810347008.

The previous prime is 66332981287. The next prime is 66332981293. The reversal of 66332981292 is 29218923366.

It is a happy number.

66332981292 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

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 7 ways as a sum of consecutive naturals, for example, 162580633 + ... + 162581040.

It is an arithmetic number, because the mean of its divisors is an integer number (6828395154).

Almost surely, 2^66332981292 is an apocalyptic number.

It is an amenable number.

66332981292 is an abundant number, since it is smaller than the sum of its proper divisors (97548502404).

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

66332981292 is a wasteful number, since it uses less digits than its factorization.

66332981292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325161697 (or 325161695 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The spelling of 66332981292 in words is "sixty-six billion, three hundred thirty-two million, nine hundred eighty-one thousand, two hundred ninety-two".