266751228 has 12 divisors (see below), whose sum is σ = 622419560. Its totient is φ = 88917072.

The previous prime is 266751227. The next prime is 266751229. The reversal of 266751228 is 822157662.

It is an interprime number because it is at equal distance from previous prime (266751227) and next prime (266751229).

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266751227) 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, 11114623 + ... + 11114646.

Almost surely, 2^266751228 is an apocalyptic number.

It is an amenable number.

266751228 is an abundant number, since it is smaller than the sum of its proper divisors (355668332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266751228 is a wasteful number, since it uses less digits than its factorization.

266751228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22229276 (or 22229274 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 266751228 is about 16332.5205648118. The cubic root of 266751228 is about 643.7276184382.

The spelling of 266751228 in words is "two hundred sixty-six million, seven hundred fifty-one thousand, two hundred twenty-eight".