2666500556240 has 40 divisors (see below), whose sum is σ = 6284540023368. Its totient is φ = 1051989258240.

The previous prime is 2666500556219. The next prime is 2666500556281. The reversal of 2666500556240 is 426550056662.

2666500556240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 389081527696 + 2277419028544 = 623764^2 + 1509112^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2666500556240² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228290441 + ... + 228302120.

Almost surely, 2^{2666500556240} is an apocalyptic number.

2666500556240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666500556240 is an abundant number, since it is smaller than the sum of its proper divisors (3618039467128).

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

2666500556240 is a wasteful number, since it uses less digits than its factorization.

2666500556240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456592647 (or 456592641 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 2666500556240 in words is "two trillion, six hundred sixty-six billion, five hundred million, five hundred fifty-six thousand, two hundred forty".