65811244 has 12 divisors (see below), whose sum is σ = 115227000. Its totient is φ = 32889248.

The previous prime is 65811241. The next prime is 65811259. The reversal of 65811244 is 44211856.

It is a super-2 number, since 2×65811244² = 8662239673655072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65811241) 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, 11832 + ... + 16480.

It is an arithmetic number, because the mean of its divisors is an integer number (9602250).

Almost surely, 2^65811244 is an apocalyptic number.

It is an amenable number.

65811244 is a deficient number, since it is larger than the sum of its proper divisors (49415756).

65811244 is a wasteful number, since it uses less digits than its factorization.

65811244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8192 (or 8190 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 65811244 is about 8112.4129579306. The cubic root of 65811244 is about 403.7383774894.

The spelling of 65811244 in words is "sixty-five million, eight hundred eleven thousand, two hundred forty-four".