66948767 has 2 divisors, whose sum is σ = 66948768. Its totient is φ = 66948766.

The previous prime is 66948709. The next prime is 66948769. The reversal of 66948767 is 76784966.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66948767 - 2¹⁰ = 66947743 is a prime.

Together with 66948769, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66948769) 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, 33474383 + 33474384.

It is an arithmetic number, because the mean of its divisors is an integer number (33474384).

Almost surely, 2^66948767 is an apocalyptic number.

66948767 is a deficient number, since it is larger than the sum of its proper divisors (1).

66948767 is an equidigital number, since it uses as much as digits as its factorization.

66948767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 53.

The square root of 66948767 is about 8182.2226198020. Note that the first 3 decimals coincide. The cubic root of 66948767 is about 406.0512586240.

The spelling of 66948767 in words is "sixty-six million, nine hundred forty-eight thousand, seven hundred sixty-seven".