669806 has 8 divisors (see below), whose sum is σ = 1048464. Its totient is φ = 320320.

The previous prime is 669791. The next prime is 669839. The reversal of 669806 is 608966.

669806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669806.

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, 7235 + ... + 7326.

It is an arithmetic number, because the mean of its divisors is an integer number (131058).

2⁶⁶⁹⁸⁰⁶ is an apocalyptic number.

669806 is a deficient number, since it is larger than the sum of its proper divisors (378658).

669806 is a wasteful number, since it uses less digits than its factorization.

669806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14586.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 669806 is about 818.4167642467. The cubic root of 669806 is about 87.4949548111.

The spelling of 669806 in words is "six hundred sixty-nine thousand, eight hundred six".