1166600155 has 16 divisors (see below), whose sum is σ = 1600530624. Its totient is φ = 799643520.

The previous prime is 1166600143. The next prime is 1166600159. The reversal of 1166600155 is 5510066611.

It is not a de Polignac number, because 1166600155 - 2²⁵ = 1133045723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166600159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119229 + ... + 128641.

It is an arithmetic number, because the mean of its divisors is an integer number (100033164).

Almost surely, 2^1166600155 is an apocalyptic number.

1166600155 is a deficient number, since it is larger than the sum of its proper divisors (433930469).

1166600155 is an equidigital number, since it uses as much as digits as its factorization.

1166600155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12966.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1166600155 is about 34155.5289082163. The cubic root of 1166600155 is about 1052.7065939147.

Adding to 1166600155 its reverse (5510066611), we get a palindrome (6676666766).

The spelling of 1166600155 in words is "one billion, one hundred sixty-six million, six hundred thousand, one hundred fifty-five".