66410065 has 16 divisors (see below), whose sum is σ = 81528192. Its totient is φ = 51917184.

The previous prime is 66410059. The next prime is 66410093. The reversal of 66410065 is 56001466.

It is a cyclic number.

It is not a de Polignac number, because 66410065 - 2¹³ = 66401873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45172 + ... + 46618.

It is an arithmetic number, because the mean of its divisors is an integer number (5095512).

Almost surely, 2^66410065 is an apocalyptic number.

It is an amenable number.

66410065 is a deficient number, since it is larger than the sum of its proper divisors (15118127).

66410065 is a wasteful number, since it uses less digits than its factorization.

66410065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66410065 is about 8149.2370808561. The cubic root of 66410065 is about 404.9592297525.

The spelling of 66410065 in words is "sixty-six million, four hundred ten thousand, sixty-five".