66696367 has 2 divisors, whose sum is σ = 66696368. Its totient is φ = 66696366.

The previous prime is 66696359. The next prime is 66696451. The reversal of 66696367 is 76369666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66696367 - 2³ = 66696359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66696367.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66696307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33348183 + 33348184.

It is an arithmetic number, because the mean of its divisors is an integer number (33348184).

Almost surely, 2^66696367 is an apocalyptic number.

66696367 is a deficient number, since it is larger than the sum of its proper divisors (1).

66696367 is an equidigital number, since it uses as much as digits as its factorization.

66696367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 49.

The square root of 66696367 is about 8166.7843733014. The cubic root of 66696367 is about 405.5403385740.

The spelling of 66696367 in words is "sixty-six million, six hundred ninety-six thousand, three hundred sixty-seven".