66219975395 has 32 divisors (see below), whose sum is σ = 94807093248. Its totient is φ = 43414195968.

The previous prime is 66219975343. The next prime is 66219975403. The reversal of 66219975395 is 59357991266.

66219975395 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66219975395 - 2¹² = 66219971299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1896182 + ... + 1930788.

It is an arithmetic number, because the mean of its divisors is an integer number (2962721664).

Almost surely, 2^66219975395 is an apocalyptic number.

66219975395 is a deficient number, since it is larger than the sum of its proper divisors (28587117853).

66219975395 is a wasteful number, since it uses less digits than its factorization.

66219975395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37019.

The product of its digits is 27556200, while the sum is 62.

The spelling of 66219975395 in words is "sixty-six billion, two hundred nineteen million, nine hundred seventy-five thousand, three hundred ninety-five".