4372266721 has 2 divisors, whose sum is σ = 4372266722. Its totient is φ = 4372266720.

The previous prime is 4372266713. The next prime is 4372266733. The reversal of 4372266721 is 1276622734.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3728934225 + 643332496 = 61065^2 + 25364^2 .

It is a cyclic number.

It is not a de Polignac number, because 4372266721 - 2³ = 4372266713 is a prime.

It is not a weakly prime, because it can be changed into another prime (4372266761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2186133360 + 2186133361.

It is an arithmetic number, because the mean of its divisors is an integer number (2186133361).

Almost surely, 2^4372266721 is an apocalyptic number.

It is an amenable number.

4372266721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4372266721 is an equidigital number, since it uses as much as digits as its factorization.

4372266721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 40.

The square root of 4372266721 is about 66123.1179013815. The cubic root of 4372266721 is about 1635.1924846407.

The spelling of 4372266721 in words is "four billion, three hundred seventy-two million, two hundred sixty-six thousand, seven hundred twenty-one".