2666250421 has 2 divisors, whose sum is σ = 2666250422. Its totient is φ = 2666250420.

The previous prime is 2666250371. The next prime is 2666250439. The reversal of 2666250421 is 1240526662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1604403025 + 1061847396 = 40055^2 + 32586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666250421 - 2⁹ = 2666249909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666250491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333125210 + 1333125211.

It is an arithmetic number, because the mean of its divisors is an integer number (1333125211).

Almost surely, 2^2666250421 is an apocalyptic number.

It is an amenable number.

2666250421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666250421 is an equidigital number, since it uses as much as digits as its factorization.

2666250421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 2666250421 is about 51635.7475108088. The cubic root of 2666250421 is about 1386.6503927903.

The spelling of 2666250421 in words is "two billion, six hundred sixty-six million, two hundred fifty thousand, four hundred twenty-one".