66396767 has 2 divisors, whose sum is σ = 66396768. Its totient is φ = 66396766.

The previous prime is 66396749. The next prime is 66396769. The reversal of 66396767 is 76769366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66396767 - 2⁸ = 66396511 is a prime.

Together with 66396769, 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 (66396769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33198383 + 33198384.

It is an arithmetic number, because the mean of its divisors is an integer number (33198384).

Almost surely, 2^66396767 is an apocalyptic number.

66396767 is a deficient number, since it is larger than the sum of its proper divisors (1).

66396767 is an equidigital number, since it uses as much as digits as its factorization.

66396767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 50.

The square root of 66396767 is about 8148.4211354102. The cubic root of 66396767 is about 404.9321981707.

The spelling of 66396767 in words is "sixty-six million, three hundred ninety-six thousand, seven hundred sixty-seven".