667255679 has 2 divisors, whose sum is σ = 667255680. Its totient is φ = 667255678.

The previous prime is 667255649. The next prime is 667255703. The reversal of 667255679 is 976552766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667255679 - 2¹² = 667251583 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667255679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667255649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333627839 + 333627840.

It is an arithmetic number, because the mean of its divisors is an integer number (333627840).

Almost surely, 2^667255679 is an apocalyptic number.

667255679 is a deficient number, since it is larger than the sum of its proper divisors (1).

667255679 is an equidigital number, since it uses as much as digits as its factorization.

667255679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4762800, while the sum is 53.

The square root of 667255679 is about 25831.2926312254. The cubic root of 667255679 is about 873.8376638384.

The spelling of 667255679 in words is "six hundred sixty-seven million, two hundred fifty-five thousand, six hundred seventy-nine".