1166431005 has 24 divisors (see below), whose sum is σ = 2025552672. Its totient is φ = 620946144.

The previous prime is 1166431001. The next prime is 1166431027. The reversal of 1166431005 is 5001346611.

1166431005 is a `hidden beast` number, since 1 + 1 + 6 + 643 + 10 + 0 + 5 = 666.

It is not a de Polignac number, because 1166431005 - 2² = 1166431001 is a prime.

It is a super-2 number, since 2×1166431005² = 2721122578850620050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1166431005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166431001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 922 + ... + 48308.

It is an arithmetic number, because the mean of its divisors is an integer number (84398028).

Almost surely, 2^1166431005 is an apocalyptic number.

1166431005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166431005 is a deficient number, since it is larger than the sum of its proper divisors (859121667).

1166431005 is a wasteful number, since it uses less digits than its factorization.

1166431005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47945 (or 47942 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1166431005 is about 34153.0526454078. The cubic root of 1166431005 is about 1052.6557127491.

Adding to 1166431005 its reverse (5001346611), we get a palindrome (6167777616).

The spelling of 1166431005 in words is "one billion, one hundred sixty-six million, four hundred thirty-one thousand, five".