266606220646 has 8 divisors (see below), whose sum is σ = 412809632064. Its totient is φ = 129003009960.

The previous prime is 266606220623. The next prime is 266606220649. The reversal of 266606220646 is 646022606662.

266606220646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 266606220596 and 266606220605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266606220649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2150050105 + ... + 2150050228.

It is an arithmetic number, because the mean of its divisors is an integer number (51601204008).

Almost surely, 2^266606220646 is an apocalyptic number.

266606220646 is a deficient number, since it is larger than the sum of its proper divisors (146203411418).

266606220646 is a wasteful number, since it uses less digits than its factorization.

266606220646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300100366.

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 266606220646 in words is "two hundred sixty-six billion, six hundred six million, two hundred twenty thousand, six hundred forty-six".