669126189 has 8 divisors (see below), whose sum is σ = 930958272. Its totient is φ = 426689120.

The previous prime is 669126131. The next prime is 669126197. The reversal of 669126189 is 981621966.

669126189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669126189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669126989) 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, 4848672 + ... + 4848809.

It is an arithmetic number, because the mean of its divisors is an integer number (116369784).

Almost surely, 2^669126189 is an apocalyptic number.

669126189 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

669126189 is a deficient number, since it is larger than the sum of its proper divisors (261832083).

669126189 is a wasteful number, since it uses less digits than its factorization.

669126189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9697507.

The product of its digits is 279936, while the sum is 48.

The square root of 669126189 is about 25867.4735720364. The cubic root of 669126189 is about 874.6534416423.

The spelling of 669126189 in words is "six hundred sixty-nine million, one hundred twenty-six thousand, one hundred eighty-nine".