669356 has 6 divisors (see below), whose sum is σ = 1171380. Its totient is φ = 334676.

The previous prime is 669329. The next prime is 669359. The reversal of 669356 is 653966.

669356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (669359) by changing a digit.

669356 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83666 + ... + 83673.

It is an arithmetic number, because the mean of its divisors is an integer number (195230).

2⁶⁶⁹³⁵⁶ is an apocalyptic number.

It is an amenable number.

669356 is a deficient number, since it is larger than the sum of its proper divisors (502024).

669356 is a wasteful number, since it uses less digits than its factorization.

669356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167343 (or 167341 counting only the distinct ones).

The product of its digits is 29160, while the sum is 35.

The square root of 669356 is about 818.1417970010. The cubic root of 669356 is about 87.4753563253.

The spelling of 669356 in words is "six hundred sixty-nine thousand, three hundred fifty-six".