66011165 has 16 divisors (see below), whose sum is σ = 86740416. Its totient is φ = 47827200.

The previous prime is 66011161. The next prime is 66011177. The reversal of 66011165 is 56111066.

It is not a de Polignac number, because 66011165 - 2² = 66011161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011161) 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, 13445 + ... + 17685.

It is an arithmetic number, because the mean of its divisors is an integer number (5421276).

Almost surely, 2^66011165 is an apocalyptic number.

It is an amenable number.

66011165 is a deficient number, since it is larger than the sum of its proper divisors (20729251).

66011165 is a wasteful number, since it uses less digits than its factorization.

66011165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 66011165 is about 8124.7255338257. The cubic root of 66011165 is about 404.1467888808.

Subtracting from 66011165 its reverse (56111066), we obtain a palindrome (9900099).

The spelling of 66011165 in words is "sixty-six million, eleven thousand, one hundred sixty-five".