66111795 has 24 divisors (see below), whose sum is σ = 118840176. Its totient is φ = 35258976.

The previous prime is 66111779. The next prime is 66111797. The reversal of 66111795 is 59711166.

It is a happy number.

It is not a de Polignac number, because 66111795 - 2⁴ = 66111779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66111797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25992 + ... + 28421.

It is an arithmetic number, because the mean of its divisors is an integer number (4951674).

Almost surely, 2^66111795 is an apocalyptic number.

66111795 is a deficient number, since it is larger than the sum of its proper divisors (52728381).

66111795 is an equidigital number, since it uses as much as digits as its factorization.

66111795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54433 (or 54421 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 66111795 is about 8130.9160000581. The cubic root of 66111795 is about 404.3520503336.

The spelling of 66111795 in words is "sixty-six million, one hundred eleven thousand, seven hundred ninety-five".