66222666535 has 8 divisors (see below), whose sum is σ = 81157991616. Its totient is φ = 51850938720.

The previous prime is 66222666529. The next prime is 66222666551. The reversal of 66222666535 is 53566622266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66222666535 - 2²⁵ = 66189112103 is a prime.

It is a Duffinian number.

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, 140899056 + ... + 140899525.

It is an arithmetic number, because the mean of its divisors is an integer number (10144748952).

Almost surely, 2^66222666535 is an apocalyptic number.

66222666535 is a deficient number, since it is larger than the sum of its proper divisors (14935325081).

66222666535 is a wasteful number, since it uses less digits than its factorization.

66222666535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281798633.

The product of its digits is 4665600, while the sum is 49.

The spelling of 66222666535 in words is "sixty-six billion, two hundred twenty-two million, six hundred sixty-six thousand, five hundred thirty-five".