65587081 has 4 divisors (see below), whose sum is σ = 74956672. Its totient is φ = 56217492.

The previous prime is 65587073. The next prime is 65587091. The reversal of 65587081 is 18078556.

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 65587081 - 2³ = 65587073 is a prime.

It is a super-2 number, since 2×65587081² = 8603330388201122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65587021) 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, 4684785 + ... + 4684798.

It is an arithmetic number, because the mean of its divisors is an integer number (18739168).

Almost surely, 2^65587081 is an apocalyptic number.

It is an amenable number.

65587081 is a deficient number, since it is larger than the sum of its proper divisors (9369591).

65587081 is an equidigital number, since it uses as much as digits as its factorization.

65587081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9369590.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 65587081 is about 8098.5851233410. The cubic root of 65587081 is about 403.2794581562.

The spelling of 65587081 in words is "sixty-five million, five hundred eighty-seven thousand, eighty-one".