265105666103 has 4 divisors (see below), whose sum is σ = 265215080688. Its totient is φ = 264996251520.

The previous prime is 265105666093. The next prime is 265105666127. The reversal of 265105666103 is 301666501562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301666501562 = 2 ⋅150833250781.

It is a cyclic number.

It is not a de Polignac number, because 265105666103 - 2⁴ = 265105666087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265105666403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54703658 + ... + 54708503.

It is an arithmetic number, because the mean of its divisors is an integer number (66303770172).

Almost surely, 2^265105666103 is an apocalyptic number.

265105666103 is a deficient number, since it is larger than the sum of its proper divisors (109414585).

265105666103 is a wasteful number, since it uses less digits than its factorization.

265105666103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109414584.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 265105666103 in words is "two hundred sixty-five billion, one hundred five million, six hundred sixty-six thousand, one hundred three".