65994143 has 2 divisors, whose sum is σ = 65994144. Its totient is φ = 65994142.

The previous prime is 65994113. The next prime is 65994161. The reversal of 65994143 is 34149956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65994143 - 2¹⁰ = 65993119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65994143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65994113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32997071 + 32997072.

It is an arithmetic number, because the mean of its divisors is an integer number (32997072).

Almost surely, 2^65994143 is an apocalyptic number.

65994143 is a deficient number, since it is larger than the sum of its proper divisors (1).

65994143 is an equidigital number, since it uses as much as digits as its factorization.

65994143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 65994143 is about 8123.6779232070. The cubic root of 65994143 is about 404.1120473940.

The spelling of 65994143 in words is "sixty-five million, nine hundred ninety-four thousand, one hundred forty-three".