669746 has 16 divisors (see below), whose sum is σ = 1252800. Its totient is φ = 260880.

The previous prime is 669733. The next prime is 669763. The reversal of 669746 is 647966.

It is an unprimeable number.

669746 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (78300).

2⁶⁶⁹⁷⁴⁶ is an apocalyptic number.

669746 is a deficient number, since it is larger than the sum of its proper divisors (583054).

669746 is a wasteful number, since it uses less digits than its factorization.

669746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4369.

The product of its digits is 54432, while the sum is 38.

The square root of 669746 is about 818.3801072851. The cubic root of 669746 is about 87.4923421870.

The spelling of 669746 in words is "six hundred sixty-nine thousand, seven hundred forty-six".