25566797 has 2 divisors, whose sum is σ = 25566798. Its totient is φ = 25566796.

The previous prime is 25566787. The next prime is 25566833. The reversal of 25566797 is 79766552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19945156 + 5621641 = 4466^2 + 2371^2 .

It is a cyclic number.

It is not a de Polignac number, because 25566797 - 2⁴ = 25566781 is a prime.

It is a super-2 number, since 2×25566797² = 1307322217678418, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25566707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12783398 + 12783399.

It is an arithmetic number, because the mean of its divisors is an integer number (12783399).

Almost surely, 2^25566797 is an apocalyptic number.

It is an amenable number.

25566797 is a deficient number, since it is larger than the sum of its proper divisors (1).

25566797 is an equidigital number, since it uses as much as digits as its factorization.

25566797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 47.

The square root of 25566797 is about 5056.3620321334. The cubic root of 25566797 is about 294.5950471630.

The spelling of 25566797 in words is "twenty-five million, five hundred sixty-six thousand, seven hundred ninety-seven".