669841 has 8 divisors (see below), whose sum is σ = 694400. Its totient is φ = 645840.

The previous prime is 669839. The next prime is 669847. The reversal of 669841 is 148966.

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

It is a cyclic number.

It is not a de Polignac number, because 669841 - 2¹ = 669839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669797 and 669806.

It is not an unprimeable number, because it can be changed into a prime (669847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4750 + ... + 4888.

It is an arithmetic number, because the mean of its divisors is an integer number (86800).

2⁶⁶⁹⁸⁴¹ is an apocalyptic number.

669841 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

669841 is a deficient number, since it is larger than the sum of its proper divisors (24559).

669841 is a wasteful number, since it uses less digits than its factorization.

669841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279.

The product of its digits is 10368, while the sum is 34.

The square root of 669841 is about 818.4381467160. The cubic root of 669841 is about 87.4964787699.

The spelling of 669841 in words is "six hundred sixty-nine thousand, eight hundred forty-one".