65106665 has 32 divisors (see below), whose sum is σ = 88166400. Its totient is φ = 45826560.

The previous prime is 65106661. The next prime is 65106683. The reversal of 65106665 is 56660156.

It is not a de Polignac number, because 65106665 - 2² = 65106661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65106661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158981 + ... + 159389.

It is an arithmetic number, because the mean of its divisors is an integer number (2755200).

Almost surely, 2^65106665 is an apocalyptic number.

65106665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65106665 is a deficient number, since it is larger than the sum of its proper divisors (23059735).

65106665 is a wasteful number, since it uses less digits than its factorization.

65106665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 65106665 is about 8068.8701191679. The cubic root of 65106665 is about 402.2923893637.

The spelling of 65106665 in words is "sixty-five million, one hundred six thousand, six hundred sixty-five".