669820889 has 8 divisors (see below), whose sum is σ = 707377440. Its totient is φ = 632494656.

The previous prime is 669820883. The next prime is 669820891. The reversal of 669820889 is 988028966.

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 669820889 - 2⁸ = 669820633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669820883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51584 + ... + 63249.

It is an arithmetic number, because the mean of its divisors is an integer number (88422180).

Almost surely, 2^669820889 is an apocalyptic number.

It is an amenable number.

669820889 is a deficient number, since it is larger than the sum of its proper divisors (37556551).

669820889 is a wasteful number, since it uses less digits than its factorization.

669820889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115159.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The square root of 669820889 is about 25880.8981490210. The cubic root of 669820889 is about 874.9560310967.

The spelling of 669820889 in words is "six hundred sixty-nine million, eight hundred twenty thousand, eight hundred eighty-nine".