266441506 has 4 divisors (see below), whose sum is σ = 399662262. Its totient is φ = 133220752.

The previous prime is 266441501. The next prime is 266441519. The reversal of 266441506 is 605144662.

266441506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605144662 = 2 ⋅302572331.

It can be written as a sum of positive squares in only one way, i.e., 243640881 + 22800625 = 15609^2 + 4775^2 .

It is a super-2 number, since 2×266441506² = 141982152239096072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266441501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66610375 + ... + 66610378.

Almost surely, 2^266441506 is an apocalyptic number.

266441506 is a deficient number, since it is larger than the sum of its proper divisors (133220756).

266441506 is a wasteful number, since it uses less digits than its factorization.

266441506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133220755.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 266441506 is about 16323.0360533817. The cubic root of 266441506 is about 643.4783801980.

The spelling of 266441506 in words is "two hundred sixty-six million, four hundred forty-one thousand, five hundred six".