9916802681 has 4 divisors (see below), whose sum is σ = 9931851600. Its totient is φ = 9901753764.

The previous prime is 9916802653. The next prime is 9916802683. The reversal of 9916802681 is 1862086199.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1862086199 = 293 ⋅6355243.

It is a cyclic number.

It is not a de Polignac number, because 9916802681 - 2¹⁸ = 9916540537 is a prime.

It is a super-2 number, since 2×9916802681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9916802683) 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, 7523471 + ... + 7524788.

It is an arithmetic number, because the mean of its divisors is an integer number (2482962900).

Almost surely, 2^9916802681 is an apocalyptic number.

It is an amenable number.

9916802681 is a deficient number, since it is larger than the sum of its proper divisors (15048919).

9916802681 is a wasteful number, since it uses less digits than its factorization.

9916802681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15048918.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 9916802681 is about 99583.1445627221. The cubic root of 9916802681 is about 2148.4432705101.

The spelling of 9916802681 in words is "nine billion, nine hundred sixteen million, eight hundred two thousand, six hundred eighty-one".