136666346 has 4 divisors (see below), whose sum is σ = 204999522. Its totient is φ = 68333172.

The previous prime is 136666339. The next prime is 136666363. The reversal of 136666346 is 643666631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 643666631 = 17 ⋅37862743.

It can be written as a sum of positive squares in only one way, i.e., 89208025 + 47458321 = 9445^2 + 6889^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34166585 + ... + 34166588.

Almost surely, 2^136666346 is an apocalyptic number.

136666346 is a deficient number, since it is larger than the sum of its proper divisors (68333176).

136666346 is an equidigital number, since it uses as much as digits as its factorization.

136666346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68333175.

The product of its digits is 279936, while the sum is 41.

The square root of 136666346 is about 11690.4382295960. The cubic root of 136666346 is about 515.0948340770.

The spelling of 136666346 in words is "one hundred thirty-six million, six hundred sixty-six thousand, three hundred forty-six".