24855661 has 2 divisors, whose sum is σ = 24855662. Its totient is φ = 24855660.

The previous prime is 24855659. The next prime is 24855673. The reversal of 24855661 is 16655842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17598025 + 7257636 = 4195^2 + 2694^2 .

It is a cyclic number.

It is not a de Polignac number, because 24855661 - 2¹ = 24855659 is a prime.

Together with 24855659, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 24855661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24855631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12427830 + 12427831.

It is an arithmetic number, because the mean of its divisors is an integer number (12427831).

Almost surely, 2^24855661 is an apocalyptic number.

It is an amenable number.

24855661 is a deficient number, since it is larger than the sum of its proper divisors (1).

24855661 is an equidigital number, since it uses as much as digits as its factorization.

24855661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 37.

The square root of 24855661 is about 4985.5452058927. The cubic root of 24855661 is about 291.8379542813.

The spelling of 24855661 in words is "twenty-four million, eight hundred fifty-five thousand, six hundred sixty-one".