6752644421 has 2 divisors, whose sum is σ = 6752644422. Its totient is φ = 6752644420.

The previous prime is 6752644399. The next prime is 6752644433. The reversal of 6752644421 is 1244462576.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6353843521 + 398800900 = 79711^2 + 19970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6752644421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6752640421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3376322210 + 3376322211.

It is an arithmetic number, because the mean of its divisors is an integer number (3376322211).

Almost surely, 2^6752644421 is an apocalyptic number.

It is an amenable number.

6752644421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6752644421 is an equidigital number, since it uses as much as digits as its factorization.

6752644421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 41.

The square root of 6752644421 is about 82174.4754835709. The cubic root of 6752644421 is about 1890.1283397821.

The spelling of 6752644421 in words is "six billion, seven hundred fifty-two million, six hundred forty-four thousand, four hundred twenty-one".