669544055 has 8 divisors (see below), whose sum is σ = 804002112. Its totient is φ = 535269088.

The previous prime is 669544037. The next prime is 669544061. The reversal of 669544055 is 550445966.

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 669544055 - 2⁸ = 669543799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669543997 and 669544015.

It is a congruent number.

It is an unprimeable number.

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, 37592 + ... + 52461.

It is an arithmetic number, because the mean of its divisors is an integer number (100500264).

Almost surely, 2^669544055 is an apocalyptic number.

669544055 is a deficient number, since it is larger than the sum of its proper divisors (134458057).

669544055 is a wasteful number, since it uses less digits than its factorization.

669544055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91545.

The product of its (nonzero) digits is 648000, while the sum is 44.

The square root of 669544055 is about 25875.5493661487. The cubic root of 669544055 is about 874.8354760057.

The spelling of 669544055 in words is "six hundred sixty-nine million, five hundred forty-four thousand, fifty-five".