7270165621 has 2 divisors, whose sum is σ = 7270165622. Its totient is φ = 7270165620.

The previous prime is 7270165613. The next prime is 7270165649. The reversal of 7270165621 is 1265610727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4923828900 + 2346336721 = 70170^2 + 48439^2 .

It is an emirp because it is prime and its reverse (1265610727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7270165621 - 2³ = 7270165613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7270165691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3635082810 + 3635082811.

It is an arithmetic number, because the mean of its divisors is an integer number (3635082811).

Almost surely, 2^7270165621 is an apocalyptic number.

It is an amenable number.

7270165621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7270165621 is an equidigital number, since it uses as much as digits as its factorization.

7270165621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 7270165621 is about 85265.2662049442. The cubic root of 7270165621 is about 1937.2311104392.

The spelling of 7270165621 in words is "seven billion, two hundred seventy million, one hundred sixty-five thousand, six hundred twenty-one".