1166061231 has 16 divisors (see below), whose sum is σ = 1728858720. Its totient is φ = 776761920.

The previous prime is 1166061227. The next prime is 1166061287. The reversal of 1166061231 is 1321606611.

1166061231 is a `hidden beast` number, since 1 + 16 + 6 + 0 + 612 + 31 = 666.

It is not a de Polignac number, because 1166061231 - 2² = 1166061227 is a prime.

It is a super-2 number, since 2×1166061231² = 2719397588882470722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1166061195 and 1166061204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166061431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19321 + ... + 52013.

It is an arithmetic number, because the mean of its divisors is an integer number (108053670).

Almost surely, 2^1166061231 is an apocalyptic number.

1166061231 is a deficient number, since it is larger than the sum of its proper divisors (562797489).

1166061231 is a wasteful number, since it uses less digits than its factorization.

1166061231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34023 (or 34017 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1166061231 is about 34147.6387324219. The cubic root of 1166061231 is about 1052.5444657483.

Adding to 1166061231 its reverse (1321606611), we get a palindrome (2487667842).

The spelling of 1166061231 in words is "one billion, one hundred sixty-six million, sixty-one thousand, two hundred thirty-one".