66321006356 has 24 divisors (see below), whose sum is σ = 134060645376. Its totient is φ = 28372622720.

The previous prime is 66321006329. The next prime is 66321006371. The reversal of 66321006356 is 65360012366.

It is a happy number.

66321006356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44331476 + ... + 44332971.

It is an arithmetic number, because the mean of its divisors is an integer number (5585860224).

Almost surely, 2^66321006356 is an apocalyptic number.

It is an amenable number.

66321006356 is an abundant number, since it is smaller than the sum of its proper divisors (67739639020).

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

66321006356 is a wasteful number, since it uses less digits than its factorization.

66321006356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88664479 (or 88664477 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 66321006356 in words is "sixty-six billion, three hundred twenty-one million, six thousand, three hundred fifty-six".