65883281 has 4 divisors (see below), whose sum is σ = 65954532. Its totient is φ = 65812032.

The previous prime is 65883271. The next prime is 65883283. The reversal of 65883281 is 18238856.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 919681 + 64963600 = 959^2 + 8060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65883281 is a prime.

It is a super-2 number, since 2×65883281² = 8681213430649922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65883283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34220 + ... + 36093.

It is an arithmetic number, because the mean of its divisors is an integer number (16488633).

Almost surely, 2^65883281 is an apocalyptic number.

It is an amenable number.

65883281 is a deficient number, since it is larger than the sum of its proper divisors (71251).

65883281 is an equidigital number, since it uses as much as digits as its factorization.

65883281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71250.

The product of its digits is 92160, while the sum is 41.

The square root of 65883281 is about 8116.8516679806. The cubic root of 65883281 is about 403.8856344745.

The spelling of 65883281 in words is "sixty-five million, eight hundred eighty-three thousand, two hundred eighty-one".