11166661 has 24 divisors (see below), whose sum is σ = 13537440. Its totient is φ = 9108000.

The previous prime is 11166643. The next prime is 11166679. The reversal of 11166661 is 16666111.

11166661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11166643) and next prime (11166679).

It is not a de Polignac number, because 11166661 - 2⁵ = 11166629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11166611) 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, 110511 + ... + 110611.

It is an arithmetic number, because the mean of its divisors is an integer number (564060).

Almost surely, 2^11166661 is an apocalyptic number.

11166661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11166661 is a deficient number, since it is larger than the sum of its proper divisors (2370779).

11166661 is a wasteful number, since it uses less digits than its factorization.

11166661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 154 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 11166661 is about 3341.6554280775. The cubic root of 11166661 is about 223.5155679507.

It can be divided in two parts, 1116 and 6661, that added together give a palindrome (7777).

The spelling of 11166661 in words is "eleven million, one hundred sixty-six thousand, six hundred sixty-one".