66550163 has 2 divisors, whose sum is σ = 66550164. Its totient is φ = 66550162.

The previous prime is 66550151. The next prime is 66550193. The reversal of 66550163 is 36105566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66550163 - 2²² = 62355859 is a prime.

It is not a weakly prime, because it can be changed into another prime (66550193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33275081 + 33275082.

It is an arithmetic number, because the mean of its divisors is an integer number (33275082).

Almost surely, 2^66550163 is an apocalyptic number.

66550163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66550163 is an equidigital number, since it uses as much as digits as its factorization.

66550163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 66550163 is about 8157.8283262153. The cubic root of 66550163 is about 405.2437957026.

The spelling of 66550163 in words is "sixty-six million, five hundred fifty thousand, one hundred sixty-three".