2526664421 has 2 divisors, whose sum is σ = 2526664422. Its totient is φ = 2526664420.

The previous prime is 2526664417. The next prime is 2526664429. The reversal of 2526664421 is 1244666252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1300684225 + 1225980196 = 36065^2 + 35014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2526664421 - 2² = 2526664417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2526664429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1263332210 + 1263332211.

It is an arithmetic number, because the mean of its divisors is an integer number (1263332211).

Almost surely, 2^2526664421 is an apocalyptic number.

It is an amenable number.

2526664421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2526664421 is an equidigital number, since it uses as much as digits as its factorization.

2526664421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 38.

The square root of 2526664421 is about 50265.9369851990. The cubic root of 2526664421 is about 1362.0169792598.

The spelling of 2526664421 in words is "two billion, five hundred twenty-six million, six hundred sixty-four thousand, four hundred twenty-one".