7721065433 has 2 divisors, whose sum is σ = 7721065434. Its totient is φ = 7721065432.

The previous prime is 7721065427. The next prime is 7721065439. The reversal of 7721065433 is 3345601277.

It is a balanced prime because it is at equal distance from previous prime (7721065427) and next prime (7721065439).

It can be written as a sum of positive squares in only one way, i.e., 4541007769 + 3180057664 = 67387^2 + 56392^2 .

It is a cyclic number.

It is not a de Polignac number, because 7721065433 - 2¹⁸ = 7720803289 is a prime.

It is a super-2 number, since 2×7721065433² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7721065439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860532716 + 3860532717.

It is an arithmetic number, because the mean of its divisors is an integer number (3860532717).

Almost surely, 2^7721065433 is an apocalyptic number.

It is an amenable number.

7721065433 is a deficient number, since it is larger than the sum of its proper divisors (1).

7721065433 is an equidigital number, since it uses as much as digits as its factorization.

7721065433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 7721065433 is about 87869.5933358064. The cubic root of 7721065433 is about 1976.4799404099.

The spelling of 7721065433 in words is "seven billion, seven hundred twenty-one million, sixty-five thousand, four hundred thirty-three".