136571966 has 4 divisors (see below), whose sum is σ = 204857952. Its totient is φ = 68285982.

The previous prime is 136571873. The next prime is 136571969. The reversal of 136571966 is 669175631.

136571966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669175631 = 83 ⋅8062357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136571969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34142990 + ... + 34142993.

It is an arithmetic number, because the mean of its divisors is an integer number (51214488).

Almost surely, 2^136571966 is an apocalyptic number.

136571966 is a deficient number, since it is larger than the sum of its proper divisors (68285986).

136571966 is an equidigital number, since it uses as much as digits as its factorization.

136571966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68285985.

The product of its digits is 204120, while the sum is 44.

The square root of 136571966 is about 11686.4009001916. The cubic root of 136571966 is about 514.9762341752.

The spelling of 136571966 in words is "one hundred thirty-six million, five hundred seventy-one thousand, nine hundred sixty-six".