669792 has 24 divisors (see below), whose sum is σ = 1758456. Its totient is φ = 223232.

The previous prime is 669791. The next prime is 669839. The reversal of 669792 is 297966.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 669792.

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 669792.

It is not an unprimeable number, because it can be changed into a prime (669791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3393 + ... + 3584.

It is an arithmetic number, because the mean of its divisors is an integer number (73269).

2⁶⁶⁹⁷⁹² is an apocalyptic number.

It is an amenable number.

669792 is an abundant number, since it is smaller than the sum of its proper divisors (1088664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669792 is a wasteful number, since it uses less digits than its factorization.

669792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990 (or 6982 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 669792 is about 818.4082111025. The cubic root of 669792 is about 87.4943452128.

The spelling of 669792 in words is "six hundred sixty-nine thousand, seven hundred ninety-two".