66949063 has 2 divisors, whose sum is σ = 66949064. Its totient is φ = 66949062.

The previous prime is 66949061. The next prime is 66949079. The reversal of 66949063 is 36094966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66949063 - 2¹ = 66949061 is a prime.

Together with 66949061, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66949061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33474531 + 33474532.

It is an arithmetic number, because the mean of its divisors is an integer number (33474532).

Almost surely, 2^66949063 is an apocalyptic number.

66949063 is a deficient number, since it is larger than the sum of its proper divisors (1).

66949063 is an equidigital number, since it uses as much as digits as its factorization.

66949063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 66949063 is about 8182.2407077768. The cubic root of 66949063 is about 406.0518570467.

The spelling of 66949063 in words is "sixty-six million, nine hundred forty-nine thousand, sixty-three".