136066614681 has 4 divisors (see below), whose sum is σ = 181422152912. Its totient is φ = 90711076452.

The previous prime is 136066614661. The next prime is 136066614713. The reversal of 136066614681 is 186416660631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186416660631 = 3 ⋅62138886877.

It is not a de Polignac number, because 136066614681 - 2⁶ = 136066614617 is a prime.

It is a super-2 number, since 2×136066614681² (a number of 23 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 136066614681.

It is not an unprimeable number, because it can be changed into a prime (136066614631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22677769111 + ... + 22677769116.

It is an arithmetic number, because the mean of its divisors is an integer number (45355538228).

Almost surely, 2^136066614681 is an apocalyptic number.

It is an amenable number.

136066614681 is a deficient number, since it is larger than the sum of its proper divisors (45355538231).

136066614681 is an equidigital number, since it uses as much as digits as its factorization.

136066614681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45355538230.

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 136066614681 in words is "one hundred thirty-six billion, sixty-six million, six hundred fourteen thousand, six hundred eighty-one".