6724778491 has 2 divisors, whose sum is σ = 6724778492. Its totient is φ = 6724778490.

The previous prime is 6724778483. The next prime is 6724778513. The reversal of 6724778491 is 1948774276.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6724778491 - 2³ = 6724778483 is a prime.

It is not a weakly prime, because it can be changed into another prime (6724778591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3362389245 + 3362389246.

It is an arithmetic number, because the mean of its divisors is an integer number (3362389246).

Almost surely, 2^6724778491 is an apocalyptic number.

6724778491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6724778491 is an equidigital number, since it uses as much as digits as its factorization.

6724778491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 55.

The square root of 6724778491 is about 82004.7467589529. The cubic root of 6724778491 is about 1887.5247769857.

The spelling of 6724778491 in words is "six billion, seven hundred twenty-four million, seven hundred seventy-eight thousand, four hundred ninety-one".