25966553 has 2 divisors, whose sum is σ = 25966554. Its totient is φ = 25966552.

The previous prime is 25966537. The next prime is 25966583. The reversal of 25966553 is 35566952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22963264 + 3003289 = 4792^2 + 1733^2 .

It is a cyclic number.

It is not a de Polignac number, because 25966553 - 2⁴ = 25966537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25966553.

It is not a weakly prime, because it can be changed into another prime (25966583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12983276 + 12983277.

It is an arithmetic number, because the mean of its divisors is an integer number (12983277).

Almost surely, 2^25966553 is an apocalyptic number.

It is an amenable number.

25966553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25966553 is an equidigital number, since it uses as much as digits as its factorization.

25966553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 41.

The square root of 25966553 is about 5095.7387099419. The cubic root of 25966553 is about 296.1225182183.

The spelling of 25966553 in words is "twenty-five million, nine hundred sixty-six thousand, five hundred fifty-three".