9121647166 has 4 divisors (see below), whose sum is σ = 13682470752. Its totient is φ = 4560823582.

The previous prime is 9121647163. The next prime is 9121647181. The reversal of 9121647166 is 6617461219.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9121647163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2280411790 + ... + 2280411793.

It is an arithmetic number, because the mean of its divisors is an integer number (3420617688).

Almost surely, 2^9121647166 is an apocalyptic number.

9121647166 is a deficient number, since it is larger than the sum of its proper divisors (4560823586).

9121647166 is a wasteful number, since it uses less digits than its factorization.

9121647166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560823585.

The product of its digits is 108864, while the sum is 43.

The square root of 9121647166 is about 95507.3147251036. The cubic root of 9121647166 is about 2089.4136283798.

The spelling of 9121647166 in words is "nine billion, one hundred twenty-one million, six hundred forty-seven thousand, one hundred sixty-six".