667891481423 has 2 divisors, whose sum is σ = 667891481424. Its totient is φ = 667891481422.

The previous prime is 667891481399. The next prime is 667891481437. The reversal of 667891481423 is 324184198766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667891481423 - 2²⁶ = 667824372559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667891481473) 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, 333945740711 + 333945740712.

It is an arithmetic number, because the mean of its divisors is an integer number (333945740712).

Almost surely, 2^667891481423 is an apocalyptic number.

667891481423 is a deficient number, since it is larger than the sum of its proper divisors (1).

667891481423 is an equidigital number, since it uses as much as digits as its factorization.

667891481423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13934592, while the sum is 59.

The spelling of 667891481423 in words is "six hundred sixty-seven billion, eight hundred ninety-one million, four hundred eighty-one thousand, four hundred twenty-three".