66500887 has 2 divisors, whose sum is σ = 66500888. Its totient is φ = 66500886.

The previous prime is 66500881. The next prime is 66500899. The reversal of 66500887 is 78800566.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66500887 is a prime.

It is a super-3 number, since 3×66500887³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66500881) 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, 33250443 + 33250444.

It is an arithmetic number, because the mean of its divisors is an integer number (33250444).

Almost surely, 2^66500887 is an apocalyptic number.

66500887 is a deficient number, since it is larger than the sum of its proper divisors (1).

66500887 is an equidigital number, since it uses as much as digits as its factorization.

66500887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 66500887 is about 8154.8076004281. The cubic root of 66500887 is about 405.1437522520.

The spelling of 66500887 in words is "sixty-six million, five hundred thousand, eight hundred eighty-seven".