65992799 has 4 divisors (see below), whose sum is σ = 66015864. Its totient is φ = 65969736.

The previous prime is 65992783. The next prime is 65992811. The reversal of 65992799 is 99729956.

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 65992799 - 2⁴ = 65992783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65992709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6512 + ... + 13205.

It is an arithmetic number, because the mean of its divisors is an integer number (16503966).

Almost surely, 2^65992799 is an apocalyptic number.

65992799 is a deficient number, since it is larger than the sum of its proper divisors (23065).

65992799 is a wasteful number, since it uses less digits than its factorization.

65992799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23064.

The product of its digits is 2755620, while the sum is 56.

The square root of 65992799 is about 8123.5952016333. The cubic root of 65992799 is about 404.1093040684.

The spelling of 65992799 in words is "sixty-five million, nine hundred ninety-two thousand, seven hundred ninety-nine".