1166812766 has 16 divisors (see below), whose sum is σ = 2010619104. Its totient is φ = 497470464.

The previous prime is 1166812763. The next prime is 1166812769. The reversal of 1166812766 is 6672186611.

It is an interprime number because it is at equal distance from previous prime (1166812763) and next prime (1166812769).

It is a super-2 number, since 2×1166812766² = 2722904061801141512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166812763) 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, 213215 + ... + 218618.

It is an arithmetic number, because the mean of its divisors is an integer number (125663694).

Almost surely, 2^1166812766 is an apocalyptic number.

1166812766 is a deficient number, since it is larger than the sum of its proper divisors (843806338).

1166812766 is a wasteful number, since it uses less digits than its factorization.

1166812766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432035.

The product of its digits is 145152, while the sum is 44.

The square root of 1166812766 is about 34158.6411614982. The cubic root of 1166812766 is about 1052.7705413907.

The spelling of 1166812766 in words is "one billion, one hundred sixty-six million, eight hundred twelve thousand, seven hundred sixty-six".