669876445 has 32 divisors (see below), whose sum is σ = 974131200. Its totient is φ = 431977536.

The previous prime is 669876421. The next prime is 669876457. The reversal of 669876445 is 544678966.

It is a cyclic number.

It is not a de Polignac number, because 669876445 - 2⁵ = 669876413 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88812 + ... + 96058.

It is an arithmetic number, because the mean of its divisors is an integer number (30441600).

Almost surely, 2^669876445 is an apocalyptic number.

It is an amenable number.

669876445 is a deficient number, since it is larger than the sum of its proper divisors (304254755).

669876445 is a wasteful number, since it uses less digits than its factorization.

669876445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7417.

The product of its digits is 8709120, while the sum is 55.

The square root of 669876445 is about 25881.9714280037. The cubic root of 669876445 is about 874.9802205053.

The spelling of 669876445 in words is "six hundred sixty-nine million, eight hundred seventy-six thousand, four hundred forty-five".