669451 has 2 divisors, whose sum is σ = 669452. Its totient is φ = 669450.

The previous prime is 669437. The next prime is 669463. The reversal of 669451 is 154966.

669451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669451 - 2⁵ = 669419 is a prime.

It is a Chen prime.

669451 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (669401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334725 + 334726.

It is an arithmetic number, because the mean of its divisors is an integer number (334726).

2⁶⁶⁹⁴⁵¹ is an apocalyptic number.

669451 is a deficient number, since it is larger than the sum of its proper divisors (1).

669451 is an equidigital number, since it uses as much as digits as its factorization.

669451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 669451 is about 818.1998533366. The cubic root of 669451 is about 87.4794945147.

The spelling of 669451 in words is "six hundred sixty-nine thousand, four hundred fifty-one".