669907 has 4 divisors (see below), whose sum is σ = 765616. Its totient is φ = 574200.

The previous prime is 669901. The next prime is 669913. The reversal of 669907 is 709966.

669907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709966 = 2 ⋅354983.

It is an interprime number because it is at equal distance from previous prime (669901) and next prime (669913).

It is a cyclic number.

It is not a de Polignac number, because 669907 - 2¹¹ = 667859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47844 + ... + 47857.

It is an arithmetic number, because the mean of its divisors is an integer number (191404).

2⁶⁶⁹⁹⁰⁷ is an apocalyptic number.

669907 is a deficient number, since it is larger than the sum of its proper divisors (95709).

669907 is an equidigital number, since it uses as much as digits as its factorization.

669907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95708.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 669907 is about 818.4784664241. The cubic root of 669907 is about 87.4993523762.

The spelling of 669907 in words is "six hundred sixty-nine thousand, nine hundred seven".