7342566821 has 2 divisors, whose sum is σ = 7342566822. Its totient is φ = 7342566820.

The previous prime is 7342566799. The next prime is 7342566827. The reversal of 7342566821 is 1286652437.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5747762596 + 1594804225 = 75814^2 + 39935^2 .

It is a cyclic number.

It is not a de Polignac number, because 7342566821 - 2³⁰ = 6268824997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7342566827) 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, 3671283410 + 3671283411.

It is an arithmetic number, because the mean of its divisors is an integer number (3671283411).

Almost surely, 2^7342566821 is an apocalyptic number.

It is an amenable number.

7342566821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7342566821 is an equidigital number, since it uses as much as digits as its factorization.

7342566821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 44.

The square root of 7342566821 is about 85688.7788511425. The cubic root of 7342566821 is about 1943.6406307214.

The spelling of 7342566821 in words is "seven billion, three hundred forty-two million, five hundred sixty-six thousand, eight hundred twenty-one".