6690000637 has 2 divisors, whose sum is σ = 6690000638. Its totient is φ = 6690000636.

The previous prime is 6690000623. The next prime is 6690000671. The reversal of 6690000637 is 7360000966.

6690000637 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4556115001 + 2133885636 = 67499^2 + 46194^2 .

It is a cyclic number.

It is not a de Polignac number, because 6690000637 - 2⁷ = 6690000509 is a prime.

It is a super-2 number, since 2×6690000637² = 89512217046120811538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6690000596 and 6690000605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6690000337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345000318 + 3345000319.

It is an arithmetic number, because the mean of its divisors is an integer number (3345000319).

Almost surely, 2^6690000637 is an apocalyptic number.

It is an amenable number.

6690000637 is a deficient number, since it is larger than the sum of its proper divisors (1).

6690000637 is an equidigital number, since it uses as much as digits as its factorization.

6690000637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 6690000637 is about 81792.4240807179. The cubic root of 6690000637 is about 1884.2653115610.

The spelling of 6690000637 in words is "six billion, six hundred ninety million, six hundred thirty-seven", and thus it is an aban number.