25066942477 has 2 divisors, whose sum is σ = 25066942478. Its totient is φ = 25066942476.

The previous prime is 25066942387. The next prime is 25066942489. The reversal of 25066942477 is 77424966052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25045911081 + 21031396 = 158259^2 + 4586^2 .

It is a cyclic number.

It is not a de Polignac number, because 25066942477 - 2¹⁵ = 25066909709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25066942577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12533471238 + 12533471239.

It is an arithmetic number, because the mean of its divisors is an integer number (12533471239).

Almost surely, 2^25066942477 is an apocalyptic number.

It is an amenable number.

25066942477 is a deficient number, since it is larger than the sum of its proper divisors (1).

25066942477 is an equidigital number, since it uses as much as digits as its factorization.

25066942477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 25066942477 in words is "twenty-five billion, sixty-six million, nine hundred forty-two thousand, four hundred seventy-seven".