669646541339 has 4 divisors (see below), whose sum is σ = 670009102224. Its totient is φ = 669283980456.

The previous prime is 669646541321. The next prime is 669646541341. The reversal of 669646541339 is 933145646966.

669646541339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669646541339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669646546339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181277672 + ... + 181281365.

It is an arithmetic number, because the mean of its divisors is an integer number (167502275556).

Almost surely, 2^669646541339 is an apocalyptic number.

669646541339 is a deficient number, since it is larger than the sum of its proper divisors (362560885).

669646541339 is a wasteful number, since it uses less digits than its factorization.

669646541339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362560884.

The product of its digits is 75582720, while the sum is 62.

The spelling of 669646541339 in words is "six hundred sixty-nine billion, six hundred forty-six million, five hundred forty-one thousand, three hundred thirty-nine".