66183861099 has 4 divisors (see below), whose sum is σ = 88245148136. Its totient is φ = 44122574064.

The previous prime is 66183861077. The next prime is 66183861113. The reversal of 66183861099 is 99016838166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66183861099 - 2²⁵ = 66150306667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66183861059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11030643514 + ... + 11030643519.

It is an arithmetic number, because the mean of its divisors is an integer number (22061287034).

Almost surely, 2^66183861099 is an apocalyptic number.

66183861099 is a deficient number, since it is larger than the sum of its proper divisors (22061287037).

66183861099 is a wasteful number, since it uses less digits than its factorization.

66183861099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22061287036.

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 66183861099 in words is "sixty-six billion, one hundred eighty-three million, eight hundred sixty-one thousand, ninety-nine".