2666500026659 has 12 divisors (see below), whose sum is σ = 3115159631064. Its totient is φ = 2275762122144.

The previous prime is 2666500026623. The next prime is 2666500026677. The reversal of 2666500026659 is 9566200056662.

It is a happy number.

It is not a de Polignac number, because 2666500026659 - 2⁴⁰ = 1566988398883 is a prime.

It is a super-2 number, since 2×2666500026659² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2666500026659.

It is not an unprimeable number, because it can be changed into a prime (2666500025659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116766197 + ... + 116789030.

It is an arithmetic number, because the mean of its divisors is an integer number (259596635922).

Almost surely, 2^{2666500026659} is an apocalyptic number.

2666500026659 is a deficient number, since it is larger than the sum of its proper divisors (448659604405).

2666500026659 is a wasteful number, since it uses less digits than its factorization.

2666500026659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233555474 (or 233555467 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 2666500026659 in words is "two trillion, six hundred sixty-six billion, five hundred million, twenty-six thousand, six hundred fifty-nine".