266221276 has 12 divisors (see below), whose sum is σ = 481952520. Its totient is φ = 128520560.

The previous prime is 266221261. The next prime is 266221303. The reversal of 266221276 is 672122662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1147390 + ... + 1147621.

It is an arithmetic number, because the mean of its divisors is an integer number (40162710).

Almost surely, 2^266221276 is an apocalyptic number.

It is an amenable number.

266221276 is a deficient number, since it is larger than the sum of its proper divisors (215731244).

266221276 is a wasteful number, since it uses less digits than its factorization.

266221276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295044 (or 2295042 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 266221276 is about 16316.2886711409. The cubic root of 266221276 is about 643.3010400774.

The spelling of 266221276 in words is "two hundred sixty-six million, two hundred twenty-one thousand, two hundred seventy-six".