1668694 has 8 divisors (see below), whose sum is σ = 2634840. Its totient is φ = 790416.

The previous prime is 1668683. The next prime is 1668721. The reversal of 1668694 is 4968661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21919 + ... + 21994.

It is an arithmetic number, because the mean of its divisors is an integer number (329355).

2^1668694 is an apocalyptic number.

1668694 is a deficient number, since it is larger than the sum of its proper divisors (966146).

1668694 is a wasteful number, since it uses less digits than its factorization.

1668694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43934.

The product of its digits is 62208, while the sum is 40.

The square root of 1668694 is about 1291.7793929305. The cubic root of 1668694 is about 118.6111640597.

The spelling of 1668694 in words is "one million, six hundred sixty-eight thousand, six hundred ninety-four".