66000797 has 2 divisors, whose sum is σ = 66000798. Its totient is φ = 66000796.

The previous prime is 66000793. The next prime is 66000811. The reversal of 66000797 is 79700066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58277956 + 7722841 = 7634^2 + 2779^2 .

It is a cyclic number.

It is not a de Polignac number, because 66000797 - 2² = 66000793 is a prime.

It is a super-2 number, since 2×66000797² = 8712210409270418, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3896171 and since 66000797 and 3896171 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66000791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000398 + 33000399.

It is an arithmetic number, because the mean of its divisors is an integer number (33000399).

Almost surely, 2^66000797 is an apocalyptic number.

It is an amenable number.

66000797 is a deficient number, since it is larger than the sum of its proper divisors (1).

66000797 is an equidigital number, since it uses as much as digits as its factorization.

66000797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 66000797 is about 8124.0874564470. The cubic root of 66000797 is about 404.1256287568.

The spelling of 66000797 in words is "sixty-six million, seven hundred ninety-seven", and thus it is an aban number.