9861492166 has 16 divisors (see below), whose sum is σ = 15553178640. Its totient is φ = 4682674080.

The previous prime is 9861492149. The next prime is 9861492211. The reversal of 9861492166 is 6612941689.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390116 + ... + 1397191.

It is an arithmetic number, because the mean of its divisors is an integer number (972073665).

Almost surely, 2^9861492166 is an apocalyptic number.

9861492166 is a deficient number, since it is larger than the sum of its proper divisors (5691686474).

9861492166 is a wasteful number, since it uses less digits than its factorization.

9861492166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787399.

The product of its digits is 1119744, while the sum is 52.

The square root of 9861492166 is about 99305.0460248622. The cubic root of 9861492166 is about 2144.4415399642.

The spelling of 9861492166 in words is "nine billion, eight hundred sixty-one million, four hundred ninety-two thousand, one hundred sixty-six".