669165 has 16 divisors (see below), whose sum is σ = 1223808. Its totient is φ = 305856.

The previous prime is 669133. The next prime is 669167. The reversal of 669165 is 561966.

It is not a de Polignac number, because 669165 - 2⁵ = 669133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3082 + ... + 3291.

It is an arithmetic number, because the mean of its divisors is an integer number (76488).

2⁶⁶⁹¹⁶⁵ is an apocalyptic number.

It is an amenable number.

669165 is a deficient number, since it is larger than the sum of its proper divisors (554643).

669165 is a wasteful number, since it uses less digits than its factorization.

669165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6388.

The product of its digits is 9720, while the sum is 33.

The square root of 669165 is about 818.0250607408. The cubic root of 669165 is about 87.4670352014.

The spelling of 669165 in words is "six hundred sixty-nine thousand, one hundred sixty-five".