669056443 has 16 divisors (see below), whose sum is σ = 777571200. Its totient is φ = 569263680.

The previous prime is 669056429. The next prime is 669056467. The reversal of 669056443 is 344650966.

It is a cyclic number.

It is not a de Polignac number, because 669056443 - 2¹³ = 669048251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 669056443.

It is not an unprimeable number, because it can be changed into a prime (669056413) 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, 1938 + ... + 36631.

It is an arithmetic number, because the mean of its divisors is an integer number (48598200).

Almost surely, 2^669056443 is an apocalyptic number.

669056443 is a deficient number, since it is larger than the sum of its proper divisors (108514757).

669056443 is a wasteful number, since it uses less digits than its factorization.

669056443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38682.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 669056443 is about 25866.1253959691. The cubic root of 669056443 is about 874.6230509130.

It can be divided in two parts, 66 and 9056443, that added together give a palindrome (9056509).

The spelling of 669056443 in words is "six hundred sixty-nine million, fifty-six thousand, four hundred forty-three".