266020660626 has 48 divisors (see below), whose sum is σ = 619379636256. Its totient is φ = 75947640384.

The previous prime is 266020660621. The next prime is 266020660681. The reversal of 266020660626 is 626066020662.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (266020660621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38110 + ... + 730406.

It is an arithmetic number, because the mean of its divisors is an integer number (12903742422).

Almost surely, 2^266020660626 is an apocalyptic number.

266020660626 is an abundant number, since it is smaller than the sum of its proper divisors (353358975630).

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

266020660626 is a wasteful number, since it uses less digits than its factorization.

266020660626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693623 (or 693616 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The spelling of 266020660626 in words is "two hundred sixty-six billion, twenty million, six hundred sixty thousand, six hundred twenty-six".