25665533 has 2 divisors, whose sum is σ = 25665534. Its totient is φ = 25665532.

The previous prime is 25665527. The next prime is 25665547. The reversal of 25665533 is 33556652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25381444 + 284089 = 5038^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 25665533 - 2⁴ = 25665517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25665493 and 25665502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25665593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832766 + 12832767.

It is an arithmetic number, because the mean of its divisors is an integer number (12832767).

Almost surely, 2^25665533 is an apocalyptic number.

It is an amenable number.

25665533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25665533 is an equidigital number, since it uses as much as digits as its factorization.

25665533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 35.

The square root of 25665533 is about 5066.1161652690. The cubic root of 25665533 is about 294.9737906429.

The spelling of 25665533 in words is "twenty-five million, six hundred sixty-five thousand, five hundred thirty-three".