669477 has 8 divisors (see below), whose sum is σ = 945216. Its totient is φ = 420032.

The previous prime is 669463. The next prime is 669479. The reversal of 669477 is 774966.

669477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 669477 - 2⁶ = 669413 is a prime.

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 669477.

It is not an unprimeable number, because it can be changed into a prime (669479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6513 + ... + 6614.

It is an arithmetic number, because the mean of its divisors is an integer number (118152).

2⁶⁶⁹⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

669477 is a deficient number, since it is larger than the sum of its proper divisors (275739).

669477 is a wasteful number, since it uses less digits than its factorization.

669477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13147.

The product of its digits is 63504, while the sum is 39.

The square root of 669477 is about 818.2157417210. The cubic root of 669477 is about 87.4806270035.

The spelling of 669477 in words is "six hundred sixty-nine thousand, four hundred seventy-seven".