2666260460161 has 2 divisors, whose sum is σ = 2666260460162. Its totient is φ = 2666260460160.

The previous prime is 2666260459991. The next prime is 2666260460207. The reversal of 2666260460161 is 1610640626662.

It is an a-pointer prime, because the next prime (2666260460207) can be obtained adding 2666260460161 to its sum of digits (46).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2496779214400 + 169481245761 = 1580120^2 + 411681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666260460161 - 2¹³ = 2666260451969 is a prime.

It is not a weakly prime, because it can be changed into another prime (2666260460861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333130230080 + 1333130230081.

It is an arithmetic number, because the mean of its divisors is an integer number (1333130230081).

Almost surely, 2^{2666260460161} is an apocalyptic number.

It is an amenable number.

2666260460161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666260460161 is an equidigital number, since it uses as much as digits as its factorization.

2666260460161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 2666260460161 in words is "two trillion, six hundred sixty-six billion, two hundred sixty million, four hundred sixty thousand, one hundred sixty-one".