6694378063 has 2 divisors, whose sum is σ = 6694378064. Its totient is φ = 6694378062.

The previous prime is 6694378037. The next prime is 6694378081. The reversal of 6694378063 is 3608734966.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6694378063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6694378063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6694378013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3347189031 + 3347189032.

It is an arithmetic number, because the mean of its divisors is an integer number (3347189032).

Almost surely, 2^6694378063 is an apocalyptic number.

6694378063 is a deficient number, since it is larger than the sum of its proper divisors (1).

6694378063 is an equidigital number, since it uses as much as digits as its factorization.

6694378063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The square root of 6694378063 is about 81819.1790657912. The cubic root of 6694378063 is about 1884.6761951100.

The spelling of 6694378063 in words is "six billion, six hundred ninety-four million, three hundred seventy-eight thousand, sixty-three".