65166165 has 24 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 34674144.

The previous prime is 65166163. The next prime is 65166173. The reversal of 65166165 is 56166156.

It is not a de Polignac number, because 65166165 - 2¹ = 65166163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65166163) 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, 21196 + ... + 24074.

It is an arithmetic number, because the mean of its divisors is an integer number (4717440).

Almost surely, 2^65166165 is an apocalyptic number.

It is an amenable number.

65166165 is a deficient number, since it is larger than the sum of its proper divisors (48052395).

65166165 is a wasteful number, since it uses less digits than its factorization.

65166165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393 (or 3390 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 65166165 is about 8072.5562865799. The cubic root of 65166165 is about 402.4149017013.

Subtracting from 65166165 its reverse (56166156), we obtain a palindrome (9000009).

The spelling of 65166165 in words is "sixty-five million, one hundred sixty-six thousand, one hundred sixty-five".