6621465493 has 2 divisors, whose sum is σ = 6621465494. Its totient is φ = 6621465492.

The previous prime is 6621465373. The next prime is 6621465517. The reversal of 6621465493 is 3945641266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4627128529 + 1994336964 = 68023^2 + 44658^2 .

It is a cyclic number.

It is not a de Polignac number, because 6621465493 - 2¹³ = 6621457301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6621465293) 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, 3310732746 + 3310732747.

It is an arithmetic number, because the mean of its divisors is an integer number (3310732747).

Almost surely, 2^6621465493 is an apocalyptic number.

It is an amenable number.

6621465493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621465493 is an equidigital number, since it uses as much as digits as its factorization.

6621465493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 46.

The square root of 6621465493 is about 81372.3877798851. The cubic root of 6621465493 is about 1877.8088147190.

The spelling of 6621465493 in words is "six billion, six hundred twenty-one million, four hundred sixty-five thousand, four hundred ninety-three".