25833366661 has 2 divisors, whose sum is σ = 25833366662. Its totient is φ = 25833366660.

The previous prime is 25833366641. The next prime is 25833366697. The reversal of 25833366661 is 16666333852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19640621025 + 6192745636 = 140145^2 + 78694^2 .

It is a cyclic number.

It is not a de Polignac number, because 25833366661 - 2¹³ = 25833358469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25833366641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12916683330 + 12916683331.

It is an arithmetic number, because the mean of its divisors is an integer number (12916683331).

Almost surely, 2^25833366661 is an apocalyptic number.

It is an amenable number.

25833366661 is a deficient number, since it is larger than the sum of its proper divisors (1).

25833366661 is an equidigital number, since it uses as much as digits as its factorization.

25833366661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 49.

The spelling of 25833366661 in words is "twenty-five billion, eight hundred thirty-three million, three hundred sixty-six thousand, six hundred sixty-one".