669797 has 4 divisors (see below), whose sum is σ = 684096. Its totient is φ = 655500.

The previous prime is 669791. The next prime is 669839. The reversal of 669797 is 797966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 669797 - 2⁶ = 669733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669797.

It is not an unprimeable number, because it can be changed into a prime (669791) 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, 7079 + ... + 7172.

It is an arithmetic number, because the mean of its divisors is an integer number (171024).

2⁶⁶⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

669797 is a deficient number, since it is larger than the sum of its proper divisors (14299).

669797 is a wasteful number, since it uses less digits than its factorization.

669797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14298.

The product of its digits is 142884, while the sum is 44.

The square root of 669797 is about 818.4112658071. The cubic root of 669797 is about 87.4945629275.

The spelling of 669797 in words is "six hundred sixty-nine thousand, seven hundred ninety-seven".