669467 has 4 divisors (see below), whose sum is σ = 685080. Its totient is φ = 653856.

The previous prime is 669463. The next prime is 669479. The reversal of 669467 is 764966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 669467 - 2² = 669463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669467.

It is not an unprimeable number, because it can be changed into a prime (669463) 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 3 ways as a sum of consecutive naturals, for example, 7742 + ... + 7827.

It is an arithmetic number, because the mean of its divisors is an integer number (171270).

2⁶⁶⁹⁴⁶⁷ is an apocalyptic number.

669467 is a deficient number, since it is larger than the sum of its proper divisors (15613).

669467 is a wasteful number, since it uses less digits than its factorization.

669467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15612.

The product of its digits is 54432, while the sum is 38.

The square root of 669467 is about 818.2096308404. The cubic root of 669467 is about 87.4801914344.

The spelling of 669467 in words is "six hundred sixty-nine thousand, four hundred sixty-seven".