6278664493 has 2 divisors, whose sum is σ = 6278664494. Its totient is φ = 6278664492.

The previous prime is 6278664467. The next prime is 6278664559. The reversal of 6278664493 is 3944668726.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6144521769 + 134142724 = 78387^2 + 11582^2 .

It is a cyclic number.

It is not a de Polignac number, because 6278664493 - 2²⁵ = 6245110061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6278664433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3139332246 + 3139332247.

It is an arithmetic number, because the mean of its divisors is an integer number (3139332247).

Almost surely, 2^6278664493 is an apocalyptic number.

It is an amenable number.

6278664493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6278664493 is an equidigital number, since it uses as much as digits as its factorization.

6278664493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 55.

The square root of 6278664493 is about 79238.0242875856. The cubic root of 6278664493 is about 1844.8274790642.

The spelling of 6278664493 in words is "six billion, two hundred seventy-eight million, six hundred sixty-four thousand, four hundred ninety-three".