65412081 has 24 divisors (see below), whose sum is σ = 111708480. Its totient is φ = 36088416.

The previous prime is 65412059. The next prime is 65412091. The reversal of 65412081 is 18021456.

65412081 is a `hidden beast` number, since 654 + 1 + 2 + 0 + 8 + 1 = 666.

It is not a de Polignac number, because 65412081 - 2⁵ = 65412049 is a prime.

It is a super-2 number, since 2×65412081² = 8557480681501122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65412001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16075 + ... + 19728.

It is an arithmetic number, because the mean of its divisors is an integer number (4654520).

Almost surely, 2^65412081 is an apocalyptic number.

It is an amenable number.

65412081 is a deficient number, since it is larger than the sum of its proper divisors (46296399).

65412081 is a wasteful number, since it uses less digits than its factorization.

65412081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35845 (or 35842 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 65412081 is about 8087.7735502424. The cubic root of 65412081 is about 402.9204607950.

The spelling of 65412081 in words is "sixty-five million, four hundred twelve thousand, eighty-one".