65418081 has 16 divisors (see below), whose sum is σ = 88817664. Its totient is φ = 42822864.

The previous prime is 65418071. The next prime is 65418097. The reversal of 65418081 is 18081456.

It is not a de Polignac number, because 65418081 - 2¹⁴ = 65401697 is a prime.

It is a super-2 number, since 2×65418081² = 8559050643445122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65418071) 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, 38410 + ... + 40076.

It is an arithmetic number, because the mean of its divisors is an integer number (5551104).

Almost surely, 2^65418081 is an apocalyptic number.

It is an amenable number.

65418081 is a deficient number, since it is larger than the sum of its proper divisors (23399583).

65418081 is a wasteful number, since it uses less digits than its factorization.

65418081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 65418081 is about 8088.1444720035. The cubic root of 65418081 is about 402.9327798693.

The spelling of 65418081 in words is "sixty-five million, four hundred eighteen thousand, eighty-one".