667375493 has 2 divisors, whose sum is σ = 667375494. Its totient is φ = 667375492.

The previous prime is 667375459. The next prime is 667375507. The reversal of 667375493 is 394573766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 637966564 + 29408929 = 25258^2 + 5423^2 .

It is a cyclic number.

It is not a de Polignac number, because 667375493 - 2¹⁰ = 667374469 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667375453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333687746 + 333687747.

It is an arithmetic number, because the mean of its divisors is an integer number (333687747).

Almost surely, 2^667375493 is an apocalyptic number.

It is an amenable number.

667375493 is a deficient number, since it is larger than the sum of its proper divisors (1).

667375493 is an equidigital number, since it uses as much as digits as its factorization.

667375493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 50.

The square root of 667375493 is about 25833.6116909734. The cubic root of 667375493 is about 873.8899634906.

The spelling of 667375493 in words is "six hundred sixty-seven million, three hundred seventy-five thousand, four hundred ninety-three".