669086 has 16 divisors (see below), whose sum is σ = 1159920. Its totient is φ = 286080.

The previous prime is 669077. The next prime is 669089. The reversal of 669086 is 680966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669089) by changing a digit.

669086 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 521 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (72495).

2⁶⁶⁹⁰⁸⁶ is an apocalyptic number.

669086 is a deficient number, since it is larger than the sum of its proper divisors (490834).

669086 is a wasteful number, since it uses less digits than its factorization.

669086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 669086 is about 817.9767722864. The cubic root of 669086 is about 87.4635930172.

It can be divided in two parts, 6690 and 86, that added together give a palindrome (6776).

The spelling of 669086 in words is "six hundred sixty-nine thousand, eighty-six".