223666671207491 has 2 divisors, whose sum is σ = 223666671207492. Its totient is φ = 223666671207490.

The previous prime is 223666671207479. The next prime is 223666671207607. The reversal of 223666671207491 is 194702176666322.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223666671207491 is a prime.

It is a super-3 number, since 3×223666671207491³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (223666671207391) 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 as a sum of consecutive naturals, namely, 111833335603745 + 111833335603746.

It is an arithmetic number, because the mean of its divisors is an integer number (111833335603746).

Almost surely, 2^{223666671207491} is an apocalyptic number.

223666671207491 is a deficient number, since it is larger than the sum of its proper divisors (1).

223666671207491 is an equidigital number, since it uses as much as digits as its factorization.

223666671207491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 223666671207491 in words is "two hundred twenty-three trillion, six hundred sixty-six billion, six hundred seventy-one million, two hundred seven thousand, four hundred ninety-one".