669767 has 8 divisors (see below), whose sum is σ = 771456. Its totient is φ = 569592.

The previous prime is 669763. The next prime is 669787. The reversal of 669767 is 767966.

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 669767 - 2² = 669763 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 669767.

It is not an unprimeable number, because it can be changed into a prime (669763) 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, 848 + ... + 1434.

It is an arithmetic number, because the mean of its divisors is an integer number (96432).

2⁶⁶⁹⁷⁶⁷ is an apocalyptic number.

669767 is a deficient number, since it is larger than the sum of its proper divisors (101689).

669767 is a wasteful number, since it uses less digits than its factorization.

669767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757.

The product of its digits is 95256, while the sum is 41.

The square root of 669767 is about 818.3929374084. The cubic root of 669767 is about 87.4932566232.

The spelling of 669767 in words is "six hundred sixty-nine thousand, seven hundred sixty-seven".