65718811 has 4 divisors (see below), whose sum is σ = 65780032. Its totient is φ = 65657592.

The previous prime is 65718803. The next prime is 65718847. The reversal of 65718811 is 11881756.

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 65718811 - 2³ = 65718803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65718871) 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, 28971 + ... + 31156.

It is an arithmetic number, because the mean of its divisors is an integer number (16445008).

Almost surely, 2^65718811 is an apocalyptic number.

65718811 is a deficient number, since it is larger than the sum of its proper divisors (61221).

65718811 is a wasteful number, since it uses less digits than its factorization.

65718811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61220.

The product of its digits is 13440, while the sum is 37.

The square root of 65718811 is about 8106.7139458599. The cubic root of 65718811 is about 403.5492698110.

The spelling of 65718811 in words is "sixty-five million, seven hundred eighteen thousand, eight hundred eleven".