265661101 has 2 divisors, whose sum is σ = 265661102. Its totient is φ = 265661100.

The previous prime is 265660973. The next prime is 265661107. The reversal of 265661101 is 101166562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202379076 + 63282025 = 14226^2 + 7955^2 .

It is a cyclic number.

It is not a de Polignac number, because 265661101 - 2⁷ = 265660973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265661101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265661107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132830550 + 132830551.

It is an arithmetic number, because the mean of its divisors is an integer number (132830551).

Almost surely, 2^265661101 is an apocalyptic number.

It is an amenable number.

265661101 is a deficient number, since it is larger than the sum of its proper divisors (1).

265661101 is an equidigital number, since it uses as much as digits as its factorization.

265661101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 265661101 is about 16299.1135035007. The cubic root of 265661101 is about 642.8495181765.

The spelling of 265661101 in words is "two hundred sixty-five million, six hundred sixty-one thousand, one hundred one".