65996611 has 4 divisors (see below), whose sum is σ = 66015000. Its totient is φ = 65978224.

The previous prime is 65996479. The next prime is 65996639. The reversal of 65996611 is 11669956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65996611 - 2¹¹ = 65994563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65996681) 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, 1861 + ... + 11638.

It is an arithmetic number, because the mean of its divisors is an integer number (16503750).

Almost surely, 2^65996611 is an apocalyptic number.

65996611 is a deficient number, since it is larger than the sum of its proper divisors (18389).

65996611 is a wasteful number, since it uses less digits than its factorization.

65996611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18388.

The product of its digits is 87480, while the sum is 43.

The square root of 65996611 is about 8123.8298234269. The cubic root of 65996611 is about 404.1170848921.

The spelling of 65996611 in words is "sixty-five million, nine hundred ninety-six thousand, six hundred eleven".