26140661 has 2 divisors, whose sum is σ = 26140662. Its totient is φ = 26140660.

The previous prime is 26140649. The next prime is 26140691. The reversal of 26140661 is 16604162.

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., 26112100 + 28561 = 5110^2 + 169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26140661 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26140661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26140691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13070330 + 13070331.

It is an arithmetic number, because the mean of its divisors is an integer number (13070331).

Almost surely, 2^26140661 is an apocalyptic number.

It is an amenable number.

26140661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26140661 is an equidigital number, since it uses as much as digits as its factorization.

26140661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 26140661 is about 5112.7938546356. The cubic root of 26140661 is about 296.7828868943.

The spelling of 26140661 in words is "twenty-six million, one hundred forty thousand, six hundred sixty-one".