6622055581 has 2 divisors, whose sum is σ = 6622055582. Its totient is φ = 6622055580.

The previous prime is 6622055567. The next prime is 6622055639. The reversal of 6622055581 is 1855502266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3414532356 + 3207523225 = 58434^2 + 56635^2 .

It is a cyclic number.

It is not a de Polignac number, because 6622055581 - 2¹³ = 6622047389 is a prime.

It is a super-2 number, since 2×6622055581² = 87703240235706495122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6622055381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311027790 + 3311027791.

It is an arithmetic number, because the mean of its divisors is an integer number (3311027791).

Almost surely, 2^6622055581 is an apocalyptic number.

It is an amenable number.

6622055581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6622055581 is an equidigital number, since it uses as much as digits as its factorization.

6622055581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 6622055581 is about 81376.0135482195. The cubic root of 6622055581 is about 1877.8645948951.

It can be divided in two parts, 66220 and 55581, that added together give a square (121801 = 349²).

The spelling of 6622055581 in words is "six billion, six hundred twenty-two million, fifty-five thousand, five hundred eighty-one".