65975081 has 4 divisors (see below), whose sum is σ = 66002772. Its totient is φ = 65947392.

The previous prime is 65975069. The next prime is 65975141. The reversal of 65975081 is 18057956.

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 12816400 + 53158681 = 3580^2 + 7291^2 .

It is a cyclic number.

It is not a de Polignac number, because 65975081 - 2¹⁰ = 65974057 is a prime.

It is a super-2 number, since 2×65975081² = 8705422625913122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65975051) 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, 9896 + ... + 15161.

It is an arithmetic number, because the mean of its divisors is an integer number (16500693).

Almost surely, 2^65975081 is an apocalyptic number.

It is an amenable number.

65975081 is a deficient number, since it is larger than the sum of its proper divisors (27691).

65975081 is a wasteful number, since it uses less digits than its factorization.

65975081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27690.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 65975081 is about 8122.5046014145. The cubic root of 65975081 is about 404.0731352255.

The spelling of 65975081 in words is "sixty-five million, nine hundred seventy-five thousand, eighty-one".