667252087 has 2 divisors, whose sum is σ = 667252088. Its totient is φ = 667252086.

The previous prime is 667251983. The next prime is 667252133. The reversal of 667252087 is 780252766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667252087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667252787) 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, 333626043 + 333626044.

It is an arithmetic number, because the mean of its divisors is an integer number (333626044).

Almost surely, 2^667252087 is an apocalyptic number.

667252087 is a deficient number, since it is larger than the sum of its proper divisors (1).

667252087 is an equidigital number, since it uses as much as digits as its factorization.

667252087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 667252087 is about 25831.2231030588. The cubic root of 667252087 is about 873.8360958085.

The spelling of 667252087 in words is "six hundred sixty-seven million, two hundred fifty-two thousand, eighty-seven".