667730087 has 2 divisors, whose sum is σ = 667730088. Its totient is φ = 667730086.

The previous prime is 667730069. The next prime is 667730137. The reversal of 667730087 is 780037766.

667730087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667730087 - 2⁶ = 667730023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667730027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333865043 + 333865044.

It is an arithmetic number, because the mean of its divisors is an integer number (333865044).

Almost surely, 2^667730087 is an apocalyptic number.

667730087 is a deficient number, since it is larger than the sum of its proper divisors (1).

667730087 is an equidigital number, since it uses as much as digits as its factorization.

667730087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 667730087 is about 25840.4738153154. The cubic root of 667730087 is about 874.0447095945.

The spelling of 667730087 in words is "six hundred sixty-seven million, seven hundred thirty thousand, eighty-seven".