6669402543 has 48 divisors (see below), whose sum is σ = 10218091520. Its totient is φ = 4346076384.

The previous prime is 6669402541. The next prime is 6669402563. The reversal of 6669402543 is 3452049666.

It is not a de Polignac number, because 6669402543 - 2¹ = 6669402541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669402541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1975605 + ... + 1978977.

Almost surely, 2^6669402543 is an apocalyptic number.

6669402543 is a deficient number, since it is larger than the sum of its proper divisors (3548688977).

6669402543 is a wasteful number, since it uses less digits than its factorization.

6669402543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570 (or 3558 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The square root of 6669402543 is about 81666.4101268079. The cubic root of 6669402543 is about 1882.3294783717.

The spelling of 6669402543 in words is "six billion, six hundred sixty-nine million, four hundred two thousand, five hundred forty-three".