669349000 has 64 divisors (see below), whose sum is σ = 1620356400. Its totient is φ = 258496000.

The previous prime is 669348997. The next prime is 669349001. The reversal of 669349000 is 943966.

669349000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 22867524 + 646481476 = 4782^2 + 25426^2 .

It is not an unprimeable number, because it can be changed into a prime (669349001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17460 + ... + 40540.

Almost surely, 2^669349000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669349000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810178200).

669349000 is an abundant number, since it is smaller than the sum of its proper divisors (951007400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669349000 is a wasteful number, since it uses less digits than its factorization.

669349000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23131 (or 23117 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 669349000 is about 25871.7799928803. The cubic root of 669349000 is about 874.7505139056.

The spelling of 669349000 in words is "six hundred sixty-nine million, three hundred forty-nine thousand".