66962971 has 2 divisors, whose sum is σ = 66962972. Its totient is φ = 66962970.

The previous prime is 66962969. The next prime is 66962993. The reversal of 66962971 is 17926966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66962971 - 2¹ = 66962969 is a prime.

Together with 66962969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66962171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33481485 + 33481486.

It is an arithmetic number, because the mean of its divisors is an integer number (33481486).

Almost surely, 2^66962971 is an apocalyptic number.

66962971 is a deficient number, since it is larger than the sum of its proper divisors (1).

66962971 is an equidigital number, since it uses as much as digits as its factorization.

66962971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 66962971 is about 8183.0905530857. The cubic root of 66962971 is about 406.0799728408.

The spelling of 66962971 in words is "sixty-six million, nine hundred sixty-two thousand, nine hundred seventy-one".