6612220291 has 2 divisors, whose sum is σ = 6612220292. Its totient is φ = 6612220290.

The previous prime is 6612220253. The next prime is 6612220301. The reversal of 6612220291 is 1920222166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6612220291 - 2¹³ = 6612212099 is a prime.

It is not a weakly prime, because it can be changed into another prime (6612220591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3306110145 + 3306110146.

It is an arithmetic number, because the mean of its divisors is an integer number (3306110146).

Almost surely, 2^6612220291 is an apocalyptic number.

6612220291 is a deficient number, since it is larger than the sum of its proper divisors (1).

6612220291 is an equidigital number, since it uses as much as digits as its factorization.

6612220291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 6612220291 is about 81315.5599562593. The cubic root of 6612220291 is about 1876.9344459430.

The spelling of 6612220291 in words is "six billion, six hundred twelve million, two hundred twenty thousand, two hundred ninety-one".