6694028609 has 2 divisors, whose sum is σ = 6694028610. Its totient is φ = 6694028608.

The previous prime is 6694028591. The next prime is 6694028633. The reversal of 6694028609 is 9068204966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4952218384 + 1741810225 = 70372^2 + 41735^2 .

It is a cyclic number.

It is not a de Polignac number, because 6694028609 - 2²⁴ = 6677251393 is a prime.

It is a super-2 number, since 2×6694028609² = 89620038036220949762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6694028689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3347014304 + 3347014305.

It is an arithmetic number, because the mean of its divisors is an integer number (3347014305).

Almost surely, 2^6694028609 is an apocalyptic number.

It is an amenable number.

6694028609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6694028609 is an equidigital number, since it uses as much as digits as its factorization.

6694028609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 6694028609 is about 81817.0435117280. The cubic root of 6694028609 is about 1884.6434004730.

The spelling of 6694028609 in words is "six billion, six hundred ninety-four million, twenty-eight thousand, six hundred nine".