9866944694 has 4 divisors (see below), whose sum is σ = 14800417044. Its totient is φ = 4933472346.

The previous prime is 9866944691. The next prime is 9866944699. The reversal of 9866944694 is 4964496689.

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

It is a self number, because there is not a number n which added to its sum of digits gives 9866944694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866944691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2466736172 + ... + 2466736175.

It is an arithmetic number, because the mean of its divisors is an integer number (3700104261).

Almost surely, 2^9866944694 is an apocalyptic number.

9866944694 is a deficient number, since it is larger than the sum of its proper divisors (4933472350).

9866944694 is a wasteful number, since it uses less digits than its factorization.

9866944694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4933472349.

The product of its digits is 80621568, while the sum is 65.

The square root of 9866944694 is about 99332.4956597789. The cubic root of 9866944694 is about 2144.8366956199.

The spelling of 9866944694 in words is "nine billion, eight hundred sixty-six million, nine hundred forty-four thousand, six hundred ninety-four".