266280216429680 has 20 divisors (see below), whose sum is σ = 619101503199192. Its totient is φ = 106512086571840.

The previous prime is 266280216429677. The next prime is 266280216429757. The reversal of 266280216429680 is 86924612082662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664251352606 + ... + 1664251352765.

Almost surely, 2^{266280216429680} is an apocalyptic number.

266280216429680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266280216429680 is an abundant number, since it is smaller than the sum of its proper divisors (352821286769512).

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

266280216429680 is a wasteful number, since it uses less digits than its factorization.

266280216429680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328502705384 (or 3328502705378 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 62.

The spelling of 266280216429680 in words is "two hundred sixty-six trillion, two hundred eighty billion, two hundred sixteen million, four hundred twenty-nine thousand, six hundred eighty".