266681004 has 12 divisors (see below), whose sum is σ = 622255704. Its totient is φ = 88893664.

The previous prime is 266680991. The next prime is 266681027. The reversal of 266681004 is 400186662.

It is a happy number.

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

It is a super-2 number, since 2×266681004² = 142237515788896032, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11111697 + ... + 11111720.

It is an arithmetic number, because the mean of its divisors is an integer number (51854642).

Almost surely, 2^266681004 is an apocalyptic number.

It is an amenable number.

266681004 is an abundant number, since it is smaller than the sum of its proper divisors (355574700).

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

266681004 is a wasteful number, since it uses less digits than its factorization.

266681004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22223424 (or 22223422 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 266681004 is about 16330.3706020408. The cubic root of 266681004 is about 643.6711249830.

It can be divided in two parts, 26668 and 1004, that added together give a palindrome (27672).

The spelling of 266681004 in words is "two hundred sixty-six million, six hundred eighty-one thousand, four".