265665151 has 4 divisors (see below), whose sum is σ = 266572152. Its totient is φ = 264758152.

The previous prime is 265665149. The next prime is 265665167. The reversal of 265665151 is 151566562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 265665151 - 2¹ = 265665149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 265665151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265665551) 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, 453061 + ... + 453646.

It is an arithmetic number, because the mean of its divisors is an integer number (66643038).

Almost surely, 2^265665151 is an apocalyptic number.

265665151 is a deficient number, since it is larger than the sum of its proper divisors (907001).

265665151 is an equidigital number, since it uses as much as digits as its factorization.

265665151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907000.

The product of its digits is 54000, while the sum is 37.

The square root of 265665151 is about 16299.2377429130. The cubic root of 265665151 is about 642.8527849040.

The spelling of 265665151 in words is "two hundred sixty-five million, six hundred sixty-five thousand, one hundred fifty-one".