65861212 has 12 divisors (see below), whose sum is σ = 117147016. Its totient is φ = 32390640.

The previous prime is 65861207. The next prime is 65861227. The reversal of 65861212 is 21216856.

It is a super-2 number, since 2×65861212² = 8675398492217888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134718 + ... + 135205.

Almost surely, 2^65861212 is an apocalyptic number.

It is an amenable number.

65861212 is a deficient number, since it is larger than the sum of its proper divisors (51285804).

65861212 is a wasteful number, since it uses less digits than its factorization.

65861212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269988 (or 269986 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 65861212 is about 8115.4920984497. The cubic root of 65861212 is about 403.8405327565.

The spelling of 65861212 in words is "sixty-five million, eight hundred sixty-one thousand, two hundred twelve".