260666101 has 2 divisors, whose sum is σ = 260666102. Its totient is φ = 260666100.

The previous prime is 260666099. The next prime is 260666167. The reversal of 260666101 is 101666062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247307076 + 13359025 = 15726^2 + 3655^2 .

It is a cyclic number.

It is not a de Polignac number, because 260666101 - 2¹ = 260666099 is a prime.

Together with 260666099, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 260666101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260666171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130333050 + 130333051.

It is an arithmetic number, because the mean of its divisors is an integer number (130333051).

Almost surely, 2^260666101 is an apocalyptic number.

It is an amenable number.

260666101 is a deficient number, since it is larger than the sum of its proper divisors (1).

260666101 is an equidigital number, since it uses as much as digits as its factorization.

260666101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 260666101 is about 16145.1571996063. The cubic root of 260666101 is about 638.7950154076.

The spelling of 260666101 in words is "two hundred sixty million, six hundred sixty-six thousand, one hundred one".