25476665663 has 2 divisors, whose sum is σ = 25476665664. Its totient is φ = 25476665662.

The previous prime is 25476665651. The next prime is 25476665693. The reversal of 25476665663 is 36656667452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25476665663 - 2²² = 25472471359 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 25476665599 and 25476665608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25476665633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12738332831 + 12738332832.

It is an arithmetic number, because the mean of its divisors is an integer number (12738332832).

Almost surely, 2^25476665663 is an apocalyptic number.

25476665663 is a deficient number, since it is larger than the sum of its proper divisors (1).

25476665663 is an equidigital number, since it uses as much as digits as its factorization.

25476665663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32659200, while the sum is 56.

The spelling of 25476665663 in words is "twenty-five billion, four hundred seventy-six million, six hundred sixty-five thousand, six hundred sixty-three".