2166418 has 16 divisors (see below), whose sum is σ = 3496320. Its totient is φ = 1003536.

The previous prime is 2166407. The next prime is 2166419. The reversal of 2166418 is 8146612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1180 + ... + 2392.

It is an arithmetic number, because the mean of its divisors is an integer number (218520).

2^2166418 is an apocalyptic number.

2166418 is a deficient number, since it is larger than the sum of its proper divisors (1329902).

2166418 is a wasteful number, since it uses less digits than its factorization.

2166418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its digits is 2304, while the sum is 28.

The square root of 2166418 is about 1471.8756740975. The cubic root of 2166418 is about 129.3939840828.

The spelling of 2166418 in words is "two million, one hundred sixty-six thousand, four hundred eighteen".