266650506 has 24 divisors (see below), whose sum is σ = 578048484. Its totient is φ = 88836480.

The previous prime is 266650487. The next prime is 266650529. The reversal of 266650506 is 605056662.

It can be written as a sum of positive squares in 2 ways, for example, as 211964481 + 54686025 = 14559^2 + 7395^2 .

It is a super-2 number, since 2×266650506² = 142204984700112072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54930 + ... + 59586.

Almost surely, 2^266650506 is an apocalyptic number.

266650506 is an abundant number, since it is smaller than the sum of its proper divisors (311397978).

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

266650506 is a wasteful number, since it uses less digits than its factorization.

266650506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7846 (or 7843 counting only the distinct ones).

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

The square root of 266650506 is about 16329.4367937170. The cubic root of 266650506 is about 643.6465870143.

The spelling of 266650506 in words is "two hundred sixty-six million, six hundred fifty thousand, five hundred six".