669407 has 8 divisors (see below), whose sum is σ = 710640. Its totient is φ = 629440.

The previous prime is 669401. The next prime is 669413. The reversal of 669407 is 704966.

It is an interprime number because it is at equal distance from previous prime (669401) and next prime (669413).

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

It is a cyclic number.

It is not a de Polignac number, because 669407 - 2⁴ = 669391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 908 + ... + 1470.

It is an arithmetic number, because the mean of its divisors is an integer number (88830).

2⁶⁶⁹⁴⁰⁷ is an apocalyptic number.

669407 is a deficient number, since it is larger than the sum of its proper divisors (41233).

669407 is a wasteful number, since it uses less digits than its factorization.

669407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 669407 is about 818.1729645986. The cubic root of 669407 is about 87.4775779283.

The spelling of 669407 in words is "six hundred sixty-nine thousand, four hundred seven".