667748087 has 2 divisors, whose sum is σ = 667748088. Its totient is φ = 667748086.

The previous prime is 667748057. The next prime is 667748131. The reversal of 667748087 is 780847766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667748087 - 2⁸ = 667747831 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 (667748057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333874043 + 333874044.

It is an arithmetic number, because the mean of its divisors is an integer number (333874044).

Almost surely, 2^667748087 is an apocalyptic number.

667748087 is a deficient number, since it is larger than the sum of its proper divisors (1).

667748087 is an equidigital number, since it uses as much as digits as its factorization.

667748087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3161088, while the sum is 53.

The square root of 667748087 is about 25840.8221037954. The cubic root of 667748087 is about 874.0525633984.

The spelling of 667748087 in words is "six hundred sixty-seven million, seven hundred forty-eight thousand, eighty-seven".