669351 has 8 divisors (see below), whose sum is σ = 939520. Its totient is φ = 422712.

The previous prime is 669329. The next prime is 669359. The reversal of 669351 is 153966.

It is a happy number.

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

It is not a de Polignac number, because 669351 - 2⁶ = 669287 is a prime.

It is a super-2 number, since 2×669351² = 896061522402, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669359) 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, 5815 + ... + 5928.

It is an arithmetic number, because the mean of its divisors is an integer number (117440).

2⁶⁶⁹³⁵¹ is an apocalyptic number.

669351 is a deficient number, since it is larger than the sum of its proper divisors (270169).

669351 is a wasteful number, since it uses less digits than its factorization.

669351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11765.

The product of its digits is 4860, while the sum is 30.

The square root of 669351 is about 818.1387412903. The cubic root of 669351 is about 87.4751385150.

The spelling of 669351 in words is "six hundred sixty-nine thousand, three hundred fifty-one".