65285881 has 8 divisors (see below), whose sum is σ = 69029280. Its totient is φ = 61573248.

The previous prime is 65285851. The next prime is 65285887. The reversal of 65285881 is 18858256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65285881 - 2⁹ = 65285369 is a prime.

It is a super-2 number, since 2×65285881² = 8524492515892322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65285887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3256 + ... + 11881.

It is an arithmetic number, because the mean of its divisors is an integer number (8628660).

Almost surely, 2^65285881 is an apocalyptic number.

It is an amenable number.

65285881 is a deficient number, since it is larger than the sum of its proper divisors (3743399).

65285881 is a wasteful number, since it uses less digits than its factorization.

65285881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15383.

The product of its digits is 153600, while the sum is 43.

The square root of 65285881 is about 8079.9678835995. The cubic root of 65285881 is about 402.6611748583.

It can be divided in two parts, 65285 and 881, that added together give a palindrome (66166).

The spelling of 65285881 in words is "sixty-five million, two hundred eighty-five thousand, eight hundred eighty-one".