66667624087 has 2 divisors, whose sum is σ = 66667624088. Its totient is φ = 66667624086.

The previous prime is 66667624069. The next prime is 66667624141. The reversal of 66667624087 is 78042676666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66667624087 - 2¹¹ = 66667622039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66667624787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333812043 + 33333812044.

It is an arithmetic number, because the mean of its divisors is an integer number (33333812044).

Almost surely, 2^66667624087 is an apocalyptic number.

66667624087 is a deficient number, since it is larger than the sum of its proper divisors (1).

66667624087 is an equidigital number, since it uses as much as digits as its factorization.

66667624087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 58.

The spelling of 66667624087 in words is "sixty-six billion, six hundred sixty-seven million, six hundred twenty-four thousand, eighty-seven".