66310065 has 12 divisors (see below), whose sum is σ = 114937524. Its totient is φ = 35365344.

The previous prime is 66310051. The next prime is 66310067. The reversal of 66310065 is 56001366.

It can be written as a sum of positive squares in 2 ways, for example, as 29550096 + 36759969 = 5436^2 + 6063^2 .

It is not a de Polignac number, because 66310065 - 2⁵ = 66310033 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66310067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 736734 + ... + 736823.

It is an arithmetic number, because the mean of its divisors is an integer number (9578127).

Almost surely, 2^66310065 is an apocalyptic number.

It is an amenable number.

66310065 is a deficient number, since it is larger than the sum of its proper divisors (48627459).

66310065 is a wasteful number, since it uses less digits than its factorization.

66310065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473568 (or 1473565 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 66310065 is about 8143.0992257248. The cubic root of 66310065 is about 404.7558656681.

The spelling of 66310065 in words is "sixty-six million, three hundred ten thousand, sixty-five".