7006421881 has 2 divisors, whose sum is σ = 7006421882. Its totient is φ = 7006421880.

The previous prime is 7006421819. The next prime is 7006421927. The reversal of 7006421881 is 1881246007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5700250000 + 1306171881 = 75500^2 + 36141^2 .

It is a cyclic number.

It is not a de Polignac number, because 7006421881 - 2⁹ = 7006421369 is a prime.

It is a super-2 number, since 2×7006421881² = 98179895149111156322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7006421881.

It is not a weakly prime, because it can be changed into another prime (7006421281) 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, 3503210940 + 3503210941.

It is an arithmetic number, because the mean of its divisors is an integer number (3503210941).

Almost surely, 2^7006421881 is an apocalyptic number.

It is an amenable number.

7006421881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7006421881 is an equidigital number, since it uses as much as digits as its factorization.

7006421881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 7006421881 is about 83704.3719348040. The cubic root of 7006421881 is about 1913.5159857080.

Adding to 7006421881 its reverse (1881246007), we get a palindrome (8887667888).

The spelling of 7006421881 in words is "seven billion, six million, four hundred twenty-one thousand, eight hundred eighty-one".