65071081 has 4 divisors (see below), whose sum is σ = 65132032. Its totient is φ = 65010132.

The previous prime is 65071073. The next prime is 65071093. The reversal of 65071081 is 18017056.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65071081 - 2³ = 65071073 is a prime.

It is a super-2 number, since 2×65071081² = 8468491165017122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65071001) 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, 28845 + ... + 31018.

It is an arithmetic number, because the mean of its divisors is an integer number (16283008).

Almost surely, 2^65071081 is an apocalyptic number.

It is an amenable number.

65071081 is a deficient number, since it is larger than the sum of its proper divisors (60951).

65071081 is a wasteful number, since it uses less digits than its factorization.

65071081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60950.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 65071081 is about 8066.6648002753. The cubic root of 65071081 is about 402.2190851372.

The spelling of 65071081 in words is "sixty-five million, seventy-one thousand, eighty-one".