6690000797 has 2 divisors, whose sum is σ = 6690000798. Its totient is φ = 6690000796.

The previous prime is 6690000781. The next prime is 6690000799. The reversal of 6690000797 is 7970000966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5556062521 + 1133938276 = 74539^2 + 33674^2 .

It is a cyclic number.

It is not a de Polignac number, because 6690000797 - 2⁴ = 6690000781 is a prime.

It is a super-2 number, since 2×6690000797² = 89512221327721270418, which contains 22 as substring.

Together with 6690000799, 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 (6690000799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345000398 + 3345000399.

It is an arithmetic number, because the mean of its divisors is an integer number (3345000399).

Almost surely, 2^6690000797 is an apocalyptic number.

It is an amenable number.

6690000797 is a deficient number, since it is larger than the sum of its proper divisors (1).

6690000797 is an equidigital number, since it uses as much as digits as its factorization.

6690000797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 6690000797 is about 81792.4250588036. The cubic root of 6690000797 is about 1884.2653265825.

The spelling of 6690000797 in words is "six billion, six hundred ninety million, seven hundred ninety-seven", and thus it is an aban number.