1866164 has 12 divisors (see below), whose sum is σ = 3312288. Its totient is φ = 919800.

The previous prime is 1866143. The next prime is 1866191. The reversal of 1866164 is 4616681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1866164.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002 + ... + 3569.

It is an arithmetic number, because the mean of its divisors is an integer number (276024).

2^1866164 is an apocalyptic number.

It is an amenable number.

1866164 is a deficient number, since it is larger than the sum of its proper divisors (1446124).

1866164 is a wasteful number, since it uses less digits than its factorization.

1866164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6646 (or 6644 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 1866164 is about 1366.0761325783. The cubic root of 1866164 is about 123.1165968652.

The spelling of 1866164 in words is "one million, eight hundred sixty-six thousand, one hundred sixty-four".