266252223465621 has 24 divisors (see below), whose sum is σ = 386025405143040. Its totient is φ = 176838438015456.

The previous prime is 266252223465583. The next prime is 266252223465629. The reversal of 266252223465621 is 126564322252662.

266252223465621 is a `hidden beast` number, since 2 + 6 + 6 + 2 + 5 + 2 + 2 + 2 + 3 + 4 + 6 + 5 + 621 = 666.

266252223465621 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 266252223465621 - 2⁷ = 266252223465493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266252223465629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40483506 + ... + 46598483.

It is an arithmetic number, because the mean of its divisors is an integer number (16084391880960).

Almost surely, 2^{266252223465621} is an apocalyptic number.

It is an amenable number.

266252223465621 is a deficient number, since it is larger than the sum of its proper divisors (119773181677419).

266252223465621 is a wasteful number, since it uses less digits than its factorization.

266252223465621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87083265 (or 87083262 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 54.

The spelling of 266252223465621 in words is "two hundred sixty-six trillion, two hundred fifty-two billion, two hundred twenty-three million, four hundred sixty-five thousand, six hundred twenty-one".