6666267326623 has 4 divisors (see below), whose sum is σ = 6666300312048. Its totient is φ = 6666234341200.

The previous prime is 6666267326617. The next prime is 6666267326629. The reversal of 6666267326623 is 3266237626666.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (6666267326617) and next prime (6666267326629).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6666267326623 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 (6666267326629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16187686 + ... + 16594387.

It is an arithmetic number, because the mean of its divisors is an integer number (1666575078012).

Almost surely, 2^{6666267326623} is an apocalyptic number.

6666267326623 is a deficient number, since it is larger than the sum of its proper divisors (32985425).

6666267326623 is a wasteful number, since it uses less digits than its factorization.

6666267326623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32985424.

The product of its digits is 141087744, while the sum is 61.

The spelling of 6666267326623 in words is "six trillion, six hundred sixty-six billion, two hundred sixty-seven million, three hundred twenty-six thousand, six hundred twenty-three".