667343567 has 4 divisors (see below), whose sum is σ = 728011176. Its totient is φ = 606675960.

The previous prime is 667343549. The next prime is 667343569. The reversal of 667343567 is 765343766.

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

It is not a de Polignac number, because 667343567 - 2⁸ = 667343311 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 (667343569) 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 in 3 ways as a sum of consecutive naturals, for example, 30333788 + ... + 30333809.

It is an arithmetic number, because the mean of its divisors is an integer number (182002794).

Almost surely, 2^667343567 is an apocalyptic number.

667343567 is a deficient number, since it is larger than the sum of its proper divisors (60667609).

667343567 is a wasteful number, since it uses less digits than its factorization.

667343567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60667608.

The product of its digits is 1905120, while the sum is 47.

The square root of 667343567 is about 25832.9937676608. The cubic root of 667343567 is about 873.8760281792.

The spelling of 667343567 in words is "six hundred sixty-seven million, three hundred forty-three thousand, five hundred sixty-seven".