1682666 has 4 divisors (see below), whose sum is σ = 2524002. Its totient is φ = 841332.

The previous prime is 1682663. The next prime is 1682669. The reversal of 1682666 is 6662861.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1682663) and next prime (1682669).

It can be written as a sum of positive squares in only one way, i.e., 1510441 + 172225 = 1229^2 + 415^2 .

It is not an unprimeable number, because it can be changed into a prime (1682663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420665 + ... + 420668.

2^1682666 is an apocalyptic number.

1682666 is a deficient number, since it is larger than the sum of its proper divisors (841336).

1682666 is an equidigital number, since it uses as much as digits as its factorization.

1682666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841335.

The product of its digits is 20736, while the sum is 35.

The square root of 1682666 is about 1297.1761638266. The cubic root of 1682666 is about 118.9412887418.

The spelling of 1682666 in words is "one million, six hundred eighty-two thousand, six hundred sixty-six".