7226666591 has 2 divisors, whose sum is σ = 7226666592. Its totient is φ = 7226666590.

The previous prime is 7226666509. The next prime is 7226666737. The reversal of 7226666591 is 1956666227.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7226666591 is a prime.

It is a super-2 number, since 2×7226666591² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7226666501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3613333295 + 3613333296.

It is an arithmetic number, because the mean of its divisors is an integer number (3613333296).

Almost surely, 2^7226666591 is an apocalyptic number.

7226666591 is a deficient number, since it is larger than the sum of its proper divisors (1).

7226666591 is an equidigital number, since it uses as much as digits as its factorization.

7226666591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 7226666591 is about 85009.8029111937. The cubic root of 7226666591 is about 1933.3597497943.

The spelling of 7226666591 in words is "seven billion, two hundred twenty-six million, six hundred sixty-six thousand, five hundred ninety-one".