266034651440 has 80 divisors (see below), whose sum is σ = 652492761600. Its totient is φ = 100595126016.

The previous prime is 266034651433. The next prime is 266034651457. The reversal of 266034651440 is 44156430662.

266034651440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514751 + ... + 892769.

It is an arithmetic number, because the mean of its divisors is an integer number (8156159520).

Almost surely, 2^266034651440 is an apocalyptic number.

266034651440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266034651440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326246380800).

266034651440 is an abundant number, since it is smaller than the sum of its proper divisors (386458110160).

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

266034651440 is a wasteful number, since it uses less digits than its factorization.

266034651440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378514 (or 378508 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 266034651440 in words is "two hundred sixty-six billion, thirty-four million, six hundred fifty-one thousand, four hundred forty".