266056417620 has 144 divisors (see below), whose sum is σ = 929370169728. Its totient is φ = 60348637440.

The previous prime is 266056417553. The next prime is 266056417651. The reversal of 266056417620 is 26714650662.

266056417620 is a `hidden beast` number, since 2 + 6 + 6 + 0 + 5 + 6 + 4 + 17 + 620 = 666.

266056417620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 640879 + ... + 970998.

It is an arithmetic number, because the mean of its divisors is an integer number (6453959512).

Almost surely, 2^266056417620 is an apocalyptic number.

266056417620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266056417620 is an abundant number, since it is smaller than the sum of its proper divisors (663313752108).

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

266056417620 is a wasteful number, since it uses less digits than its factorization.

266056417620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612030 (or 1612025 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 266056417620 in words is "two hundred sixty-six billion, fifty-six million, four hundred seventeen thousand, six hundred twenty".