1166681356 has 12 divisors (see below), whose sum is σ = 2043949768. Its totient is φ = 582695712.

The previous prime is 1166681353. The next prime is 1166681381. The reversal of 1166681356 is 6531866611.

It is a super-2 number, since 2×1166681356² = 2722290772875997472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1166681353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157161 + ... + 164416.

Almost surely, 2^1166681356 is an apocalyptic number.

It is an amenable number.

1166681356 is a deficient number, since it is larger than the sum of its proper divisors (877268412).

1166681356 is a wasteful number, since it uses less digits than its factorization.

1166681356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322488 (or 322486 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 1166681356 is about 34156.7175823439. The cubic root of 1166681356 is about 1052.7310178343.

The spelling of 1166681356 in words is "one billion, one hundred sixty-six million, six hundred eighty-one thousand, three hundred fifty-six".