66061967 has 2 divisors, whose sum is σ = 66061968. Its totient is φ = 66061966.

The previous prime is 66061951. The next prime is 66061969. The reversal of 66061967 is 76916066.

66061967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66061967 - 2⁴ = 66061951 is a prime.

Together with 66061969, 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 (66061969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33030983 + 33030984.

It is an arithmetic number, because the mean of its divisors is an integer number (33030984).

Almost surely, 2^66061967 is an apocalyptic number.

66061967 is a deficient number, since it is larger than the sum of its proper divisors (1).

66061967 is an equidigital number, since it uses as much as digits as its factorization.

66061967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 66061967 is about 8127.8513150771. The cubic root of 66061967 is about 404.2504390256.

The spelling of 66061967 in words is "sixty-six million, sixty-one thousand, nine hundred sixty-seven".