266288004642 has 64 divisors (see below), whose sum is σ = 597585010176. Its totient is φ = 78408207360.

The previous prime is 266288004583. The next prime is 266288004673. The reversal of 266288004642 is 246400882662.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 266288004591 and 266288004600.

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 31 ways as a sum of consecutive naturals, for example, 304653 + ... + 790815.

It is an arithmetic number, because the mean of its divisors is an integer number (9337265784).

Almost surely, 2^266288004642 is an apocalyptic number.

266288004642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 266288004642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298792505088).

266288004642 is an abundant number, since it is smaller than the sum of its proper divisors (331297005534).

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

266288004642 is a wasteful number, since it uses less digits than its factorization.

266288004642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486415.

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 266288004642 in words is "two hundred sixty-six billion, two hundred eighty-eight million, four thousand, six hundred forty-two".