266140446456 has 64 divisors (see below), whose sum is σ = 671449927680. Its totient is φ = 87903666560.

The previous prime is 266140446427. The next prime is 266140446529. The reversal of 266140446456 is 654644041662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1165801 + ... + 1375271.

It is an arithmetic number, because the mean of its divisors is an integer number (10491405120).

Almost surely, 2^266140446456 is an apocalyptic number.

It is an amenable number.

266140446456 is an abundant number, since it is smaller than the sum of its proper divisors (405309481224).

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

266140446456 is a wasteful number, since it uses less digits than its factorization.

266140446456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209964 (or 209960 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 266140446456 in words is "two hundred sixty-six billion, one hundred forty million, four hundred forty-six thousand, four hundred fifty-six".