66108797 has 2 divisors, whose sum is σ = 66108798. Its totient is φ = 66108796.

The previous prime is 66108793. The next prime is 66108803. The reversal of 66108797 is 79780166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50537881 + 15570916 = 7109^2 + 3946^2 .

It is a cyclic number.

It is not a de Polignac number, because 66108797 - 2² = 66108793 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66108793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33054398 + 33054399.

It is an arithmetic number, because the mean of its divisors is an integer number (33054399).

Almost surely, 2^66108797 is an apocalyptic number.

It is an amenable number.

66108797 is a deficient number, since it is larger than the sum of its proper divisors (1).

66108797 is an equidigital number, since it uses as much as digits as its factorization.

66108797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 66108797 is about 8130.7316398956. The cubic root of 66108797 is about 404.3459381325.

The spelling of 66108797 in words is "sixty-six million, one hundred eight thousand, seven hundred ninety-seven".