1866466 has 8 divisors (see below), whose sum is σ = 3199680. Its totient is φ = 799908.

The previous prime is 1866461. The next prime is 1866467. The reversal of 1866466 is 6646681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1866461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66646 + ... + 66673.

It is an arithmetic number, because the mean of its divisors is an integer number (399960).

2^1866466 is an apocalyptic number.

1866466 is a deficient number, since it is larger than the sum of its proper divisors (1333214).

1866466 is a wasteful number, since it uses less digits than its factorization.

1866466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133328.

The product of its digits is 41472, while the sum is 37.

The square root of 1866466 is about 1366.1866636737. The cubic root of 1866466 is about 123.1232377976.

It can be divided in two parts, 1866 and 466, that added together give a palindrome (2332).

The spelling of 1866466 in words is "one million, eight hundred sixty-six thousand, four hundred sixty-six".