65771313 has 16 divisors (see below), whose sum is σ = 88698240. Its totient is φ = 43349504.

The previous prime is 65771309. The next prime is 65771323. The reversal of 65771313 is 31317756.

It is a cyclic number.

It is not a de Polignac number, because 65771313 - 2² = 65771309 is a prime.

It is a super-2 number, since 2×65771313² = 8651731227487938, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65771323) 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, 183028 + ... + 183386.

It is an arithmetic number, because the mean of its divisors is an integer number (5543640).

Almost surely, 2^65771313 is an apocalyptic number.

It is an amenable number.

65771313 is a deficient number, since it is larger than the sum of its proper divisors (22926927).

65771313 is a wasteful number, since it uses less digits than its factorization.

65771313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888.

The product of its digits is 13230, while the sum is 33.

The square root of 65771313 is about 8109.9514795096. The cubic root of 65771313 is about 403.6567048254.

The spelling of 65771313 in words is "sixty-five million, seven hundred seventy-one thousand, three hundred thirteen".