65790399 has 8 divisors (see below), whose sum is σ = 88045312. Its totient is φ = 43697880.

The previous prime is 65790397. The next prime is 65790457. The reversal of 65790399 is 99309756.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65790399 - 2¹ = 65790397 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 (65790397) 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 7 ways as a sum of consecutive naturals, for example, 39649 + ... + 41274.

It is an arithmetic number, because the mean of its divisors is an integer number (11005664).

Almost surely, 2^65790399 is an apocalyptic number.

65790399 is a deficient number, since it is larger than the sum of its proper divisors (22254913).

65790399 is a wasteful number, since it uses less digits than its factorization.

65790399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81197.

The product of its (nonzero) digits is 459270, while the sum is 48.

The square root of 65790399 is about 8111.1280966337. The cubic root of 65790399 is about 403.6957463995.

The spelling of 65790399 in words is "sixty-five million, seven hundred ninety thousand, three hundred ninety-nine".