1666382 has 4 divisors (see below), whose sum is σ = 2499576. Its totient is φ = 833190.

The previous prime is 1666361. The next prime is 1666387. The reversal of 1666382 is 2836661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2836661 = 59 ⋅48079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416594 + ... + 416597.

It is an arithmetic number, because the mean of its divisors is an integer number (624894).

2^1666382 is an apocalyptic number.

1666382 is a deficient number, since it is larger than the sum of its proper divisors (833194).

1666382 is an equidigital number, since it uses as much as digits as its factorization.

1666382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833193.

The product of its digits is 10368, while the sum is 32.

The square root of 1666382 is about 1290.8841931018. The cubic root of 1666382 is about 118.5563595723.

It can be divided in two parts, 1666 and 382, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1666382 in words is "one million, six hundred sixty-six thousand, three hundred eighty-two".