266640006040 has 32 divisors (see below), whose sum is σ = 609775101360. Its totient is φ = 104907542400.

The previous prime is 266640005993. The next prime is 266640006047. The reversal of 266640006040 is 40600046662.

It is a super-2 number, since 2×266640006040² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266640005987 and 266640006005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266640006047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54636906 + ... + 54641785.

Almost surely, 2^266640006040 is an apocalyptic number.

266640006040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266640006040 is an abundant number, since it is smaller than the sum of its proper divisors (343135095320).

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

266640006040 is a wasteful number, since it uses less digits than its factorization.

266640006040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109278763 (or 109278759 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 266640006040 in words is "two hundred sixty-six billion, six hundred forty million, six thousand, forty".