2666181 has 8 divisors (see below), whose sum is σ = 4062784. Its totient is φ = 1523520.

The previous prime is 2666177. The next prime is 2666197. The reversal of 2666181 is 1816662.

2666181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2666181 - 2² = 2666177 is a prime.

It is a super-2 number, since 2×2666181² = 14217042249522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

2666181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63460 + ... + 63501.

It is an arithmetic number, because the mean of its divisors is an integer number (507848).

2^2666181 is an apocalyptic number.

2666181 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2666181 is a deficient number, since it is larger than the sum of its proper divisors (1396603).

2666181 is a wasteful number, since it uses less digits than its factorization.

2666181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126971.

The product of its digits is 3456, while the sum is 30.

The square root of 2666181 is about 1632.8444506443. The cubic root of 2666181 is about 138.6638357975.

The spelling of 2666181 in words is "two million, six hundred sixty-six thousand, one hundred eighty-one".