266897445909280 has 48 divisors (see below), whose sum is σ = 630546802421760. Its totient is φ = 106758709756672.

The previous prime is 266897445909257. The next prime is 266897445909317. The reversal of 266897445909280 is 82909544798662.

It is a self number, because there is not a number n which added to its sum of digits gives 266897445909280.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69250017 + ... + 73002463.

It is an arithmetic number, because the mean of its divisors is an integer number (13136391717120).

Almost surely, 2^{266897445909280} is an apocalyptic number.

266897445909280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266897445909280 is an abundant number, since it is smaller than the sum of its proper divisors (363649356512480).

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

266897445909280 is a wasteful number, since it uses less digits than its factorization.

266897445909280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4197001 (or 4196993 counting only the distinct ones).

The product of its (nonzero) digits is 3762339840, while the sum is 79.

The spelling of 266897445909280 in words is "two hundred sixty-six trillion, eight hundred ninety-seven billion, four hundred forty-five million, nine hundred nine thousand, two hundred eighty".