669161 has 8 divisors (see below), whose sum is σ = 722400. Its totient is φ = 617760.

The previous prime is 669133. The next prime is 669167. The reversal of 669161 is 161966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669161 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669161.

It is not an unprimeable number, because it can be changed into a prime (669167) 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 7 ways as a sum of consecutive naturals, for example, 350 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (90300).

2⁶⁶⁹¹⁶¹ is an apocalyptic number.

It is an amenable number.

669161 is a deficient number, since it is larger than the sum of its proper divisors (53239).

669161 is a wasteful number, since it uses less digits than its factorization.

669161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its digits is 1944, while the sum is 29.

The square root of 669161 is about 818.0226158243. The cubic root of 669161 is about 87.4668609201.

The spelling of 669161 in words is "six hundred sixty-nine thousand, one hundred sixty-one".