10666666156655 has 16 divisors (see below), whose sum is σ = 12860420453280. Its totient is φ = 8493078453888.

The previous prime is 10666666156633. The next prime is 10666666156691. The reversal of 10666666156655 is 55665166666601.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10666666156655 - 2¹² = 10666666152559 is a prime.

It is a super-2 number, since 2×10666666156655² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10666666156591 and 10666666156600.

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, 1616849 + ... + 4893621.

It is an arithmetic number, because the mean of its divisors is an integer number (803776278330).

Almost surely, 2^{10666666156655} is an apocalyptic number.

10666666156655 is a deficient number, since it is larger than the sum of its proper divisors (2193754296625).

10666666156655 is a wasteful number, since it uses less digits than its factorization.

10666666156655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279850.

The product of its (nonzero) digits is 209952000, while the sum is 65.

The spelling of 10666666156655 in words is "ten trillion, six hundred sixty-six billion, six hundred sixty-six million, one hundred fifty-six thousand, six hundred fifty-five".