1668569624447 has 6 divisors (see below), whose sum is σ = 1834047603864. Its totient is φ = 1516881476660.

The previous prime is 1668569624401. The next prime is 1668569624467. The reversal of 1668569624447 is 7444269658661.

It is not a de Polignac number, because 1668569624447 - 2¹⁴ = 1668569608063 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 (1668569624467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6894915683 + ... + 6894915924.

It is an arithmetic number, because the mean of its divisors is an integer number (305674600644).

Almost surely, 2^{1668569624447} is an apocalyptic number.

1668569624447 is a deficient number, since it is larger than the sum of its proper divisors (165477979417).

1668569624447 is a wasteful number, since it uses less digits than its factorization.

1668569624447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13789831629 (or 13789831618 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 68.

The spelling of 1668569624447 in words is "one trillion, six hundred sixty-eight billion, five hundred sixty-nine million, six hundred twenty-four thousand, four hundred forty-seven".