65668699503 has 12 divisors (see below), whose sum is σ = 103477950888. Its totient is φ = 39799211760.

The previous prime is 65668699489. The next prime is 65668699553. The reversal of 65668699503 is 30599686656.

65668699503 is a `hidden beast` number, since 6 + 5 + 6 + 68 + 69 + 9 + 503 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-65668699503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65668699553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331660000 + ... + 331660197.

It is an arithmetic number, because the mean of its divisors is an integer number (8623162574).

Almost surely, 2^65668699503 is an apocalyptic number.

65668699503 is a deficient number, since it is larger than the sum of its proper divisors (37809251385).

65668699503 is a wasteful number, since it uses less digits than its factorization.

65668699503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663320214 (or 663320211 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 63.

The spelling of 65668699503 in words is "sixty-five billion, six hundred sixty-eight million, six hundred ninety-nine thousand, five hundred three".