6623162521 has 2 divisors, whose sum is σ = 6623162522. Its totient is φ = 6623162520.

The previous prime is 6623162479. The next prime is 6623162561. The reversal of 6623162521 is 1252613266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5091536025 + 1531626496 = 71355^2 + 39136^2 .

It is a cyclic number.

It is not a de Polignac number, because 6623162521 - 2¹¹ = 6623160473 is a prime.

It is not a weakly prime, because it can be changed into another prime (6623162561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311581260 + 3311581261.

It is an arithmetic number, because the mean of its divisors is an integer number (3311581261).

Almost surely, 2^6623162521 is an apocalyptic number.

It is an amenable number.

6623162521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6623162521 is an equidigital number, since it uses as much as digits as its factorization.

6623162521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 6623162521 is about 81382.8146539550. The cubic root of 6623162521 is about 1877.9692234149.

Adding to 6623162521 its reverse (1252613266), we get a palindrome (7875775787).

The spelling of 6623162521 in words is "six billion, six hundred twenty-three million, one hundred sixty-two thousand, five hundred twenty-one".