66100187 has 2 divisors, whose sum is σ = 66100188. Its totient is φ = 66100186.

The previous prime is 66100117. The next prime is 66100207. The reversal of 66100187 is 78100166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66100187 - 2¹⁴ = 66083803 is a prime.

It is a Chen prime.

It is equal to p_3901736 and since 66100187 and 3901736 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (66100117) 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, 33050093 + 33050094.

It is an arithmetic number, because the mean of its divisors is an integer number (33050094).

Almost surely, 2^66100187 is an apocalyptic number.

66100187 is a deficient number, since it is larger than the sum of its proper divisors (1).

66100187 is an equidigital number, since it uses as much as digits as its factorization.

66100187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 66100187 is about 8130.2021500083. The cubic root of 66100187 is about 404.3283833852.

The spelling of 66100187 in words is "sixty-six million, one hundred thousand, one hundred eighty-seven".