4025266020661 has 2 divisors, whose sum is σ = 4025266020662. Its totient is φ = 4025266020660.

The previous prime is 4025266020653. The next prime is 4025266020679. The reversal of 4025266020661 is 1660206625204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3066666416100 + 958599604561 = 1751190^2 + 979081^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025266020661 - 2³ = 4025266020653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4025266020761) 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, 2012633010330 + 2012633010331.

It is an arithmetic number, because the mean of its divisors is an integer number (2012633010331).

Almost surely, 2^{4025266020661} is an apocalyptic number.

It is an amenable number.

4025266020661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4025266020661 is an equidigital number, since it uses as much as digits as its factorization.

4025266020661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 4025266020661 in words is "four trillion, twenty-five billion, two hundred sixty-six million, twenty thousand, six hundred sixty-one".