1680662 has 4 divisors (see below), whose sum is σ = 2520996. Its totient is φ = 840330.

The previous prime is 1680659. The next prime is 1680689. The reversal of 1680662 is 2660861.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420164 + ... + 420167.

It is an arithmetic number, because the mean of its divisors is an integer number (630249).

2^1680662 is an apocalyptic number.

1680662 is a deficient number, since it is larger than the sum of its proper divisors (840334).

1680662 is an equidigital number, since it uses as much as digits as its factorization.

1680662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840333.

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

The square root of 1680662 is about 1296.4034865735. The cubic root of 1680662 is about 118.8940515934.

The spelling of 1680662 in words is "one million, six hundred eighty thousand, six hundred sixty-two".