266009042560 has 64 divisors (see below), whose sum is σ = 646706397600. Its totient is φ = 104600151040.

The previous prime is 266009042521. The next prime is 266009042573. The reversal of 266009042560 is 65240900662.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 3484606 + ... + 3560125.

Almost surely, 2^266009042560 is an apocalyptic number.

266009042560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266009042560 is an abundant number, since it is smaller than the sum of its proper divisors (380697355040).

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

266009042560 is an equidigital number, since it uses as much as digits as its factorization.

266009042560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044809 (or 7044797 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 266009042560 in words is "two hundred sixty-six billion, nine million, forty-two thousand, five hundred sixty".