66707404087 has 2 divisors, whose sum is σ = 66707404088. Its totient is φ = 66707404086.

The previous prime is 66707404079. The next prime is 66707404123. The reversal of 66707404087 is 78040470766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66707404087 - 2³ = 66707404079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66707404087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66707404037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33353702043 + 33353702044.

It is an arithmetic number, because the mean of its divisors is an integer number (33353702044).

Almost surely, 2^66707404087 is an apocalyptic number.

66707404087 is a deficient number, since it is larger than the sum of its proper divisors (1).

66707404087 is an equidigital number, since it uses as much as digits as its factorization.

66707404087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1580544, while the sum is 49.

The spelling of 66707404087 in words is "sixty-six billion, seven hundred seven million, four hundred four thousand, eighty-seven".