65679399 has 6 divisors (see below), whose sum is σ = 94870256. Its totient is φ = 43786260.

The previous prime is 65679377. The next prime is 65679433. The reversal of 65679399 is 99397656.

65679399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65679399 - 2¹² = 65675303 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 (65679319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3648847 + ... + 3648864.

Almost surely, 2^65679399 is an apocalyptic number.

65679399 is a deficient number, since it is larger than the sum of its proper divisors (29190857).

65679399 is a wasteful number, since it uses less digits than its factorization.

65679399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7297717 (or 7297714 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The square root of 65679399 is about 8104.2827566664. The cubic root of 65679399 is about 403.4685833023.

The spelling of 65679399 in words is "sixty-five million, six hundred seventy-nine thousand, three hundred ninety-nine".