2199668 has 24 divisors (see below), whose sum is σ = 4105920. Its totient is φ = 1028160.

The previous prime is 2199661. The next prime is 2199683. The reversal of 2199668 is 8669912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199661) 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, 7688 + ... + 7968.

It is an arithmetic number, because the mean of its divisors is an integer number (171080).

2^2199668 is an apocalyptic number.

It is an amenable number.

2199668 is a deficient number, since it is larger than the sum of its proper divisors (1906252).

2199668 is a wasteful number, since it uses less digits than its factorization.

2199668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 405 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 2199668 is about 1483.1277760193. The cubic root of 2199668 is about 130.0526019869.

The spelling of 2199668 in words is "two million, one hundred ninety-nine thousand, six hundred sixty-eight".