66196187 has 2 divisors, whose sum is σ = 66196188. Its totient is φ = 66196186.

The previous prime is 66196127. The next prime is 66196213. The reversal of 66196187 is 78169166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66196187 - 2⁸ = 66195931 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66196127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33098093 + 33098094.

It is an arithmetic number, because the mean of its divisors is an integer number (33098094).

Almost surely, 2^66196187 is an apocalyptic number.

66196187 is a deficient number, since it is larger than the sum of its proper divisors (1).

66196187 is an equidigital number, since it uses as much as digits as its factorization.

66196187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 66196187 is about 8136.1039201819. The cubic root of 66196187 is about 404.5240295731.

The spelling of 66196187 in words is "sixty-six million, one hundred ninety-six thousand, one hundred eighty-seven".