65999999917 has 8 divisors (see below), whose sum is σ = 67550212224. Its totient is φ = 64450484448.

The previous prime is 65999999911. The next prime is 65999999927. The reversal of 65999999917 is 71999999956.

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

It is a cyclic number.

It is not a de Polignac number, because 65999999917 - 2⁷ = 65999999789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65999999911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19953 + ... + 363865.

It is an arithmetic number, because the mean of its divisors is an integer number (8443776528).

Almost surely, 2^65999999917 is an apocalyptic number.

It is an amenable number.

65999999917 is a deficient number, since it is larger than the sum of its proper divisors (1550212307).

65999999917 is a wasteful number, since it uses less digits than its factorization.

65999999917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348419.

The product of its digits is 1004423490, while the sum is 82.

The spelling of 65999999917 in words is "sixty-five billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventeen".