6669412439 has 2 divisors, whose sum is σ = 6669412440. Its totient is φ = 6669412438.

The previous prime is 6669412411. The next prime is 6669412481. The reversal of 6669412439 is 9342149666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6669412439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6669412499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334706219 + 3334706220.

It is an arithmetic number, because the mean of its divisors is an integer number (3334706220).

Almost surely, 2^6669412439 is an apocalyptic number.

6669412439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669412439 is an equidigital number, since it uses as much as digits as its factorization.

6669412439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 50.

The square root of 6669412439 is about 81666.4707147309. The cubic root of 6669412439 is about 1882.3304093658.

The spelling of 6669412439 in words is "six billion, six hundred sixty-nine million, four hundred twelve thousand, four hundred thirty-nine".