669171 has 8 divisors (see below), whose sum is σ = 944784. Its totient is φ = 419840.

The previous prime is 669167. The next prime is 669173. The reversal of 669171 is 171966.

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 669171 - 2² = 669167 is a prime.

669171 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669171.

It is not an unprimeable number, because it can be changed into a prime (669173) 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, 6510 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (118098).

2⁶⁶⁹¹⁷¹ is an apocalyptic number.

669171 is a deficient number, since it is larger than the sum of its proper divisors (275613).

669171 is a wasteful number, since it uses less digits than its factorization.

669171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13141.

The product of its digits is 2268, while the sum is 30.

The square root of 669171 is about 818.0287281019. The cubic root of 669171 is about 87.4672966221.

The spelling of 669171 in words is "six hundred sixty-nine thousand, one hundred seventy-one".