25066291477 has 2 divisors, whose sum is σ = 25066291478. Its totient is φ = 25066291476.

The previous prime is 25066291463. The next prime is 25066291487. The reversal of 25066291477 is 77419266052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21961461636 + 3104829841 = 148194^2 + 55721^2 .

It is a cyclic number.

It is not a de Polignac number, because 25066291477 - 2¹⁵ = 25066258709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25066291477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25066291487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12533145738 + 12533145739.

It is an arithmetic number, because the mean of its divisors is an integer number (12533145739).

Almost surely, 2^25066291477 is an apocalyptic number.

It is an amenable number.

25066291477 is a deficient number, since it is larger than the sum of its proper divisors (1).

25066291477 is an equidigital number, since it uses as much as digits as its factorization.

25066291477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 25066291477 in words is "twenty-five billion, sixty-six million, two hundred ninety-one thousand, four hundred seventy-seven".