26007661 has 2 divisors, whose sum is σ = 26007662. Its totient is φ = 26007660.

The previous prime is 26007659. The next prime is 26007673. The reversal of 26007661 is 16670062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22146436 + 3861225 = 4706^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 26007661 - 2¹ = 26007659 is a prime.

Together with 26007659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26007691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13003830 + 13003831.

It is an arithmetic number, because the mean of its divisors is an integer number (13003831).

Almost surely, 2^26007661 is an apocalyptic number.

It is an amenable number.

26007661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26007661 is an equidigital number, since it uses as much as digits as its factorization.

26007661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 26007661 is about 5099.7706811189. The cubic root of 26007661 is about 296.2787010120.

The spelling of 26007661 in words is "twenty-six million, seven thousand, six hundred sixty-one".