669814 has 16 divisors (see below), whose sum is σ = 1049760. Its totient is φ = 320320.

The previous prime is 669791. The next prime is 669839. The reversal of 669814 is 418966.

669814 is nontrivially palindromic in base 7.

669814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

669814 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a self number, because there is not a number n which added to its sum of digits gives 669814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7482 + ... + 7570.

It is an arithmetic number, because the mean of its divisors is an integer number (65610).

2⁶⁶⁹⁸¹⁴ is an apocalyptic number.

669814 is a deficient number, since it is larger than the sum of its proper divisors (379946).

669814 is a wasteful number, since it uses less digits than its factorization.

669814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215.

The product of its digits is 10368, while the sum is 34.

The square root of 669814 is about 818.4216517175. The cubic root of 669814 is about 87.4953031492.

The spelling of 669814 in words is "six hundred sixty-nine thousand, eight hundred fourteen".