65885185081 has 4 divisors (see below), whose sum is σ = 68010513664. Its totient is φ = 63759856500.

The previous prime is 65885185033. The next prime is 65885185097. The reversal of 65885185081 is 18058158856.

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 65885185081 - 2¹⁷ = 65885054009 is a prime.

It is a super-2 number, since 2×65885185081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65885185031) 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, 1062664245 + ... + 1062664306.

It is an arithmetic number, because the mean of its divisors is an integer number (17002628416).

Almost surely, 2^65885185081 is an apocalyptic number.

It is an amenable number.

65885185081 is a deficient number, since it is larger than the sum of its proper divisors (2125328583).

65885185081 is a wasteful number, since it uses less digits than its factorization.

65885185081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125328582.

The product of its (nonzero) digits is 3072000, while the sum is 55.

The spelling of 65885185081 in words is "sixty-five billion, eight hundred eighty-five million, one hundred eighty-five thousand, eighty-one".