667343423 has 2 divisors, whose sum is σ = 667343424. Its totient is φ = 667343422.

The previous prime is 667343407. The next prime is 667343431. The reversal of 667343423 is 324343766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667343423 - 2⁴ = 667343407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667343473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333671711 + 333671712.

It is an arithmetic number, because the mean of its divisors is an integer number (333671712).

Almost surely, 2^667343423 is an apocalyptic number.

667343423 is a deficient number, since it is larger than the sum of its proper divisors (1).

667343423 is an equidigital number, since it uses as much as digits as its factorization.

667343423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 38.

The square root of 667343423 is about 25832.9909805272. The cubic root of 667343423 is about 873.8759653240.

It can be divided in two parts, 667343 and 423, that added together give a palindrome (667766).

The spelling of 667343423 in words is "six hundred sixty-seven million, three hundred forty-three thousand, four hundred twenty-three".