1802666 has 4 divisors (see below), whose sum is σ = 2704002. Its totient is φ = 901332.

The previous prime is 1802659. The next prime is 1802683. The reversal of 1802666 is 6662081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6662081 = 1097 ⋅6073.

It can be written as a sum of positive squares in only one way, i.e., 1729225 + 73441 = 1315^2 + 271^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450665 + ... + 450668.

2^1802666 is an apocalyptic number.

1802666 is a deficient number, since it is larger than the sum of its proper divisors (901336).

1802666 is an equidigital number, since it uses as much as digits as its factorization.

1802666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901335.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1802666 is about 1342.6339784171. The cubic root of 1802666 is about 121.7040663990.

The spelling of 1802666 in words is "one million, eight hundred two thousand, six hundred sixty-six".