66796693 has 2 divisors, whose sum is σ = 66796694. Its totient is φ = 66796692.

The previous prime is 66796663. The next prime is 66796733. The reversal of 66796693 is 39669766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65399569 + 1397124 = 8087^2 + 1182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66796693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66796693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66796603) 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, 33398346 + 33398347.

It is an arithmetic number, because the mean of its divisors is an integer number (33398347).

Almost surely, 2^66796693 is an apocalyptic number.

It is an amenable number.

66796693 is a deficient number, since it is larger than the sum of its proper divisors (1).

66796693 is an equidigital number, since it uses as much as digits as its factorization.

66796693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 52.

The square root of 66796693 is about 8172.9243848209. The cubic root of 66796693 is about 405.7435773136.

The spelling of 66796693 in words is "sixty-six million, seven hundred ninety-six thousand, six hundred ninety-three".