66111802279 has 16 divisors (see below), whose sum is σ = 71952012000. Its totient is φ = 60530385024.

The previous prime is 66111802259. The next prime is 66111802283. The reversal of 66111802279 is 97220811166.

66111802279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66111802279 - 2¹⁵ = 66111769511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66111802259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210832 + ... + 420325.

It is an arithmetic number, because the mean of its divisors is an integer number (4497000750).

Almost surely, 2^66111802279 is an apocalyptic number.

66111802279 is a deficient number, since it is larger than the sum of its proper divisors (5840209721).

66111802279 is a wasteful number, since it uses less digits than its factorization.

66111802279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631362.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 66111802279 in words is "sixty-six billion, one hundred eleven million, eight hundred two thousand, two hundred seventy-nine".