266646038480 has 40 divisors (see below), whose sum is σ = 619974819072. Its totient is φ = 106654496384.

The previous prime is 266646038447. The next prime is 266646038489. The reversal of 266646038480 is 84830646662.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×266646038480² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266646038489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3225017 + ... + 3306663.

Almost surely, 2^266646038480 is an apocalyptic number.

266646038480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266646038480 is an abundant number, since it is smaller than the sum of its proper divisors (353328780592).

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

266646038480 is a wasteful number, since it uses less digits than its factorization.

266646038480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122483 (or 122477 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 53.

The spelling of 266646038480 in words is "two hundred sixty-six billion, six hundred forty-six million, thirty-eight thousand, four hundred eighty".