1866966 has 16 divisors (see below), whose sum is σ = 3795888. Its totient is φ = 612000.

The previous prime is 1866961. The next prime is 1866967. The reversal of 1866966 is 6696681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2185 + ... + 2916.

It is an arithmetic number, because the mean of its divisors is an integer number (237243).

2^1866966 is an apocalyptic number.

1866966 is an abundant number, since it is smaller than the sum of its proper divisors (1928922).

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

1866966 is a wasteful number, since it uses less digits than its factorization.

1866966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167.

The product of its digits is 93312, while the sum is 42.

The square root of 1866966 is about 1366.3696425199. The cubic root of 1866966 is about 123.1342311441.

The spelling of 1866966 in words is "one million, eight hundred sixty-six thousand, nine hundred sixty-six".