266471235440 has 20 divisors (see below), whose sum is σ = 619545622584. Its totient is φ = 106588494144.

The previous prime is 266471235431. The next prime is 266471235461. The reversal of 266471235440 is 44532174662.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 266471235391 and 266471235400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1665445142 + ... + 1665445301.

Almost surely, 2^266471235440 is an apocalyptic number.

266471235440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266471235440 is an abundant number, since it is smaller than the sum of its proper divisors (353074387144).

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

266471235440 is a wasteful number, since it uses less digits than its factorization.

266471235440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330890456 (or 3330890450 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 266471235440 in words is "two hundred sixty-six billion, four hundred seventy-one million, two hundred thirty-five thousand, four hundred forty".