66532187 has 2 divisors, whose sum is σ = 66532188. Its totient is φ = 66532186.

The previous prime is 66532181. The next prime is 66532189. The reversal of 66532187 is 78123566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66532187 - 2⁴ = 66532171 is a prime.

Together with 66532189, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66532187.

It is not a weakly prime, because it can be changed into another prime (66532181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33266093 + 33266094.

It is an arithmetic number, because the mean of its divisors is an integer number (33266094).

Almost surely, 2^66532187 is an apocalyptic number.

66532187 is a deficient number, since it is larger than the sum of its proper divisors (1).

66532187 is an equidigital number, since it uses as much as digits as its factorization.

66532187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 66532187 is about 8156.7264879975. The cubic root of 66532187 is about 405.2073053414.

The spelling of 66532187 in words is "sixty-six million, five hundred thirty-two thousand, one hundred eighty-seven".