65535861 has 4 divisors (see below), whose sum is σ = 87381152. Its totient is φ = 43690572.

The previous prime is 65535857. The next prime is 65535863. The reversal of 65535861 is 16853556.

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 not a de Polignac number, because 65535861 - 2² = 65535857 is a prime.

It is a super-2 number, since 2×65535861² = 8589898154022642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65535863) 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, 10922641 + ... + 10922646.

It is an arithmetic number, because the mean of its divisors is an integer number (21845288).

Almost surely, 2^65535861 is an apocalyptic number.

It is an amenable number.

65535861 is a deficient number, since it is larger than the sum of its proper divisors (21845291).

65535861 is a wasteful number, since it uses less digits than its factorization.

65535861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21845290.

The product of its digits is 108000, while the sum is 39.

The square root of 65535861 is about 8095.4222249368. The cubic root of 65535861 is about 403.1744509254.

The spelling of 65535861 in words is "sixty-five million, five hundred thirty-five thousand, eight hundred sixty-one".