25527661 has 2 divisors, whose sum is σ = 25527662. Its totient is φ = 25527660.

The previous prime is 25527653. The next prime is 25527673. The reversal of 25527661 is 16672552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 7123561 = 4290^2 + 2669^2 .

It is a cyclic number.

It is not a de Polignac number, because 25527661 - 2³ = 25527653 is a prime.

It is a super-2 number, since 2×25527661² = 1303322952261842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25527611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12763830 + 12763831.

It is an arithmetic number, because the mean of its divisors is an integer number (12763831).

Almost surely, 2^25527661 is an apocalyptic number.

It is an amenable number.

25527661 is a deficient number, since it is larger than the sum of its proper divisors (1).

25527661 is an equidigital number, since it uses as much as digits as its factorization.

25527661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 25527661 is about 5052.4905739645. The cubic root of 25527661 is about 294.4446547155. Note that the first 3 decimals are identical.

The spelling of 25527661 in words is "twenty-five million, five hundred twenty-seven thousand, six hundred sixty-one".