65416665 has 16 divisors (see below), whose sum is σ = 108043776. Its totient is φ = 33763200.

The previous prime is 65416651. The next prime is 65416667. The reversal of 65416665 is 56661456.

It is not a de Polignac number, because 65416665 - 2⁸ = 65416409 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65416667) 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, 69876 + ... + 70805.

It is an arithmetic number, because the mean of its divisors is an integer number (6752736).

Almost surely, 2^65416665 is an apocalyptic number.

It is an amenable number.

65416665 is a deficient number, since it is larger than the sum of its proper divisors (42627111).

65416665 is a wasteful number, since it uses less digits than its factorization.

65416665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140720.

The product of its digits is 129600, while the sum is 39.

The square root of 65416665 is about 8088.0569360014. The cubic root of 65416665 is about 402.9298726357.

The spelling of 65416665 in words is "sixty-five million, four hundred sixteen thousand, six hundred sixty-five".