66111892 has 48 divisors (see below), whose sum is σ = 147345408. Its totient is φ = 25204320.

The previous prime is 66111883. The next prime is 66111911. The reversal of 66111892 is 29811166.

66111892 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12193 + ... + 16759.

It is an arithmetic number, because the mean of its divisors is an integer number (3069696).

Almost surely, 2^66111892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66111892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73672704).

66111892 is an abundant number, since it is smaller than the sum of its proper divisors (81233516).

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

66111892 is a wasteful number, since it uses less digits than its factorization.

66111892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636 (or 4634 counting only the distinct ones).

The product of its digits is 5184, while the sum is 34.

The square root of 66111892 is about 8130.9219649435. The cubic root of 66111892 is about 404.3522480902.

The spelling of 66111892 in words is "sixty-six million, one hundred eleven thousand, eight hundred ninety-two".