1166189986 has 16 divisors (see below), whose sum is σ = 1884431808. Its totient is φ = 538074000.

The previous prime is 1166189933. The next prime is 1166189989. The reversal of 1166189986 is 6899816611.

It is not an unprimeable number, because it can be changed into a prime (1166189989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125811 + ... + 134761.

It is an arithmetic number, because the mean of its divisors is an integer number (117776988).

Almost surely, 2^1166189986 is an apocalyptic number.

1166189986 is a deficient number, since it is larger than the sum of its proper divisors (718241822).

1166189986 is a wasteful number, since it uses less digits than its factorization.

1166189986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13977.

The product of its digits is 1119744, while the sum is 55.

The square root of 1166189986 is about 34149.5239498298. The cubic root of 1166189986 is about 1052.5832045302.

The spelling of 1166189986 in words is "one billion, one hundred sixty-six million, one hundred eighty-nine thousand, nine hundred eighty-six".