65899247 has 4 divisors (see below), whose sum is σ = 65933400. Its totient is φ = 65865096.

The previous prime is 65899241. The next prime is 65899279. The reversal of 65899247 is 74299856.

It is a happy number.

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 65899247 - 2¹⁰ = 65898223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65899195 and 65899204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65899241) 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, 13997 + ... + 18102.

It is an arithmetic number, because the mean of its divisors is an integer number (16483350).

Almost surely, 2^65899247 is an apocalyptic number.

65899247 is a deficient number, since it is larger than the sum of its proper divisors (34153).

65899247 is a wasteful number, since it uses less digits than its factorization.

65899247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34152.

The product of its digits is 1088640, while the sum is 50.

The square root of 65899247 is about 8117.8351178131. The cubic root of 65899247 is about 403.9182574056.

The spelling of 65899247 in words is "sixty-five million, eight hundred ninety-nine thousand, two hundred forty-seven".