65165623 has 2 divisors, whose sum is σ = 65165624. Its totient is φ = 65165622.

The previous prime is 65165609. The next prime is 65165651. The reversal of 65165623 is 32656156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65165623 - 2⁵ = 65165591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65165603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32582811 + 32582812.

It is an arithmetic number, because the mean of its divisors is an integer number (32582812).

Almost surely, 2^65165623 is an apocalyptic number.

65165623 is a deficient number, since it is larger than the sum of its proper divisors (1).

65165623 is an equidigital number, since it uses as much as digits as its factorization.

65165623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 34.

The square root of 65165623 is about 8072.5227159792. The cubic root of 65165623 is about 402.4137860432.

The spelling of 65165623 in words is "sixty-five million, one hundred sixty-five thousand, six hundred twenty-three".