266355147990 has 128 divisors (see below), whose sum is σ = 662358062592. Its totient is φ = 68510407680.

The previous prime is 266355147979. The next prime is 266355148021. The reversal of 266355147990 is 99741553662.

It is a self number, because there is not a number n which added to its sum of digits gives 266355147990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59974170 + ... + 59978610.

It is an arithmetic number, because the mean of its divisors is an integer number (5174672364).

Almost surely, 2^266355147990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266355147990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331179031296).

266355147990 is an abundant number, since it is smaller than the sum of its proper divisors (396002914602).

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

266355147990 is a wasteful number, since it uses less digits than its factorization.

266355147990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5134.

The product of its (nonzero) digits is 12247200, while the sum is 57.

The spelling of 266355147990 in words is "two hundred sixty-six billion, three hundred fifty-five million, one hundred forty-seven thousand, nine hundred ninety".