669417 has 16 divisors (see below), whose sum is σ = 1032192. Its totient is φ = 378000.

The previous prime is 669413. The next prime is 669419. The reversal of 669417 is 714966.

It is a happy number.

It is not a de Polignac number, because 669417 - 2² = 669413 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669417.

It is not an unprimeable number, because it can be changed into a prime (669413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2542 + ... + 2792.

It is an arithmetic number, because the mean of its divisors is an integer number (64512).

2⁶⁶⁹⁴¹⁷ is an apocalyptic number.

It is an amenable number.

669417 is a deficient number, since it is larger than the sum of its proper divisors (362775).

669417 is a wasteful number, since it uses less digits than its factorization.

669417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388.

The product of its digits is 9072, while the sum is 33.

The square root of 669417 is about 818.1790757530. The cubic root of 669417 is about 87.4780135235.

The spelling of 669417 in words is "six hundred sixty-nine thousand, four hundred seventeen".