6721499254 has 16 divisors (see below), whose sum is σ = 10804951008. Its totient is φ = 3127747392.

The previous prime is 6721499249. The next prime is 6721499297. The reversal of 6721499254 is 4529941276.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6721499198 and 6721499207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1972887 + ... + 1976290.

It is an arithmetic number, because the mean of its divisors is an integer number (675309438).

Almost surely, 2^6721499254 is an apocalyptic number.

6721499254 is a deficient number, since it is larger than the sum of its proper divisors (4083451754).

6721499254 is a wasteful number, since it uses less digits than its factorization.

6721499254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949239.

The product of its digits is 1088640, while the sum is 49.

The square root of 6721499254 is about 81984.7501307408. The cubic root of 6721499254 is about 1887.2179194209.

The spelling of 6721499254 in words is "six billion, seven hundred twenty-one million, four hundred ninety-nine thousand, two hundred fifty-four".