6667676422591 has 4 divisors (see below), whose sum is σ = 6668627189112. Its totient is φ = 6666725656072.

The previous prime is 6667676422579. The next prime is 6667676422637. The reversal of 6667676422591 is 1952246767666.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6667676422591 - 2⁴¹ = 4468653167039 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 (6667676422571) 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, 475372741 + ... + 475386766.

It is an arithmetic number, because the mean of its divisors is an integer number (1667156797278).

Almost surely, 2^{6667676422591} is an apocalyptic number.

6667676422591 is a deficient number, since it is larger than the sum of its proper divisors (950766521).

6667676422591 is an equidigital number, since it uses as much as digits as its factorization.

6667676422591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950766520.

The product of its digits is 274337280, while the sum is 67.

The spelling of 6667676422591 in words is "six trillion, six hundred sixty-seven billion, six hundred seventy-six million, four hundred twenty-two thousand, five hundred ninety-one".