266669306928864 has 72 divisors (see below), whose sum is σ = 866675247525360. Its totient is φ = 76191230550528.

The previous prime is 266669306928851. The next prime is 266669306928889. The reversal of 266669306928864 is 468829603966662.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×266669306928864² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

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, 66138218949 + ... + 66138222980.

It is an arithmetic number, because the mean of its divisors is an integer number (12037156215630).

Almost surely, 2^{266669306928864} is an apocalyptic number.

266669306928864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

266669306928864 is an abundant number, since it is smaller than the sum of its proper divisors (600005940596496).

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

266669306928864 is a wasteful number, since it uses less digits than its factorization.

266669306928864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132276441952 (or 132276441941 counting only the distinct ones).

The product of its (nonzero) digits is 11609505792, while the sum is 81.

The spelling of 266669306928864 in words is "two hundred sixty-six trillion, six hundred sixty-nine billion, three hundred six million, nine hundred twenty-eight thousand, eight hundred sixty-four".