12661066110626 has 4 divisors (see below), whose sum is σ = 18991599165942. Its totient is φ = 6330533055312.

The previous prime is 12661066110601. The next prime is 12661066110709. The reversal of 12661066110626 is 62601166016621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12507009075625 + 154057035001 = 3536525^2 + 392501^2 .

It is a super-3 number, since 3×12661066110626³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165266527655 + ... + 3165266527658.

Almost surely, 2^{12661066110626} is an apocalyptic number.

12661066110626 is a deficient number, since it is larger than the sum of its proper divisors (6330533055316).

12661066110626 is an equidigital number, since it uses as much as digits as its factorization.

12661066110626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330533055315.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 12661066110626 in words is "twelve trillion, six hundred sixty-one billion, sixty-six million, one hundred ten thousand, six hundred twenty-six".