265244661 has 12 divisors (see below), whose sum is σ = 417961440. Its totient is φ = 160754280.

The previous prime is 265244647. The next prime is 265244663. The reversal of 265244661 is 166442562.

It is not a de Polignac number, because 265244661 - 2¹⁹ = 264720373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265244663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1339521 + ... + 1339718.

It is an arithmetic number, because the mean of its divisors is an integer number (34830120).

Almost surely, 2^265244661 is an apocalyptic number.

It is an amenable number.

265244661 is a deficient number, since it is larger than the sum of its proper divisors (152716779).

265244661 is a wasteful number, since it uses less digits than its factorization.

265244661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679256 (or 2679253 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 265244661 is about 16286.3335652933. Note that the first 3 decimals coincide. The cubic root of 265244661 is about 642.5134405481.

The spelling of 265244661 in words is "two hundred sixty-five million, two hundred forty-four thousand, six hundred sixty-one".