266650065 has 48 divisors (see below), whose sum is σ = 520505856. Its totient is φ = 125107200.

The previous prime is 266650057. The next prime is 266650067. The reversal of 266650065 is 560056662.

It is not a de Polignac number, because 266650065 - 2³ = 266650057 is a prime.

It is a super-2 number, since 2×266650065² = 142204514329008450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266650067) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6657 + ... + 24033.

It is an arithmetic number, because the mean of its divisors is an integer number (10843872).

Almost surely, 2^266650065 is an apocalyptic number.

It is an amenable number.

266650065 is a deficient number, since it is larger than the sum of its proper divisors (253855791).

266650065 is a wasteful number, since it uses less digits than its factorization.

266650065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17430 (or 17427 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 266650065 is about 16329.4232904901. The cubic root of 266650065 is about 643.6462321824.

The spelling of 266650065 in words is "two hundred sixty-six million, six hundred fifty thousand, sixty-five".