9866619013 has 4 divisors (see below), whose sum is σ = 9874089388. Its totient is φ = 9859148640.

The previous prime is 9866619011. The next prime is 9866619031. The reversal of 9866619013 is 3109166689.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4124465284 + 5742153729 = 64222^2 + 75777^2 .

It is a cyclic number.

It is not a de Polignac number, because 9866619013 - 2¹ = 9866619011 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 (9866619011) 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, 3733206 + ... + 3735847.

It is an arithmetic number, because the mean of its divisors is an integer number (2468522347).

Almost surely, 2^9866619013 is an apocalyptic number.

It is an amenable number.

9866619013 is a deficient number, since it is larger than the sum of its proper divisors (7470375).

9866619013 is a wasteful number, since it uses less digits than its factorization.

9866619013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7470374.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 9866619013 is about 99330.8562985339. The cubic root of 9866619013 is about 2144.8130969523.

The spelling of 9866619013 in words is "nine billion, eight hundred sixty-six million, six hundred nineteen thousand, thirteen".