266460381 has 32 divisors (see below), whose sum is σ = 445507200. Its totient is φ = 155917440.

The previous prime is 266460367. The next prime is 266460449. The reversal of 266460381 is 183064662.

266460381 is a `hidden beast` number, since 2 + 6 + 646 + 0 + 3 + 8 + 1 = 666.

It is not a de Polignac number, because 266460381 - 2⁵ = 266460349 is a prime.

It is a super-2 number, since 2×266460381² = 142002269285330322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266460361) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6856 + ... + 24081.

It is an arithmetic number, because the mean of its divisors is an integer number (13922100).

Almost surely, 2^266460381 is an apocalyptic number.

It is an amenable number.

266460381 is a deficient number, since it is larger than the sum of its proper divisors (179046819).

266460381 is a wasteful number, since it uses less digits than its factorization.

266460381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30986 (or 30980 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 266460381 is about 16323.6142137702. The cubic root of 266460381 is about 643.4935747371.

The spelling of 266460381 in words is "two hundred sixty-six million, four hundred sixty thousand, three hundred eighty-one".