1668366 has 24 divisors (see below), whose sum is σ = 4131504. Its totient is φ = 476640.

The previous prime is 1668361. The next prime is 1668379. The reversal of 1668366 is 6638661.

It is a self number, because there is not a number n which added to its sum of digits gives 1668366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668361) 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 11 ways as a sum of consecutive naturals, for example, 6495 + ... + 6746.

It is an arithmetic number, because the mean of its divisors is an integer number (172146).

2^1668366 is an apocalyptic number.

1668366 is an abundant number, since it is smaller than the sum of its proper divisors (2463138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668366 is a wasteful number, since it uses less digits than its factorization.

1668366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13256 (or 13253 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 1668366 is about 1291.6524300291. The cubic root of 1668366 is about 118.6033921113.

The spelling of 1668366 in words is "one million, six hundred sixty-eight thousand, three hundred sixty-six".