11166555 has 32 divisors (see below), whose sum is σ = 18643968. Its totient is φ = 5702400.

The previous prime is 11166503. The next prime is 11166559. The reversal of 11166555 is 55566111.

It is not a de Polignac number, because 11166555 - 2⁷ = 11166427 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11166559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41070 + ... + 41340.

It is an arithmetic number, because the mean of its divisors is an integer number (582624).

Almost surely, 2^11166555 is an apocalyptic number.

11166555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11166555 is a deficient number, since it is larger than the sum of its proper divisors (7477413).

11166555 is a wasteful number, since it uses less digits than its factorization.

11166555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387.

The product of its digits is 4500, while the sum is 30.

The square root of 11166555 is about 3341.6395676374. The cubic root of 11166555 is about 223.5148607048.

It can be divided in two parts, 111 and 66555, that added together give a palindrome (66666).

The spelling of 11166555 in words is "eleven million, one hundred sixty-six thousand, five hundred fifty-five".