669433 has 2 divisors, whose sum is σ = 669434. Its totient is φ = 669432.

The previous prime is 669419. The next prime is 669437. The reversal of 669433 is 334966.

669433 is nontrivially palindromic in base 15.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660969 + 8464 = 813^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 669433 - 2⁵ = 669401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669395 and 669404.

It is not a weakly prime, because it can be changed into another prime (669437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334716 + 334717.

It is an arithmetic number, because the mean of its divisors is an integer number (334717).

2⁶⁶⁹⁴³³ is an apocalyptic number.

It is an amenable number.

669433 is a deficient number, since it is larger than the sum of its proper divisors (1).

669433 is an equidigital number, since it uses as much as digits as its factorization.

669433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 31.

The square root of 669433 is about 818.1888535051. The cubic root of 669433 is about 87.4787104667.

The spelling of 669433 in words is "six hundred sixty-nine thousand, four hundred thirty-three".