136668458 has 8 divisors (see below), whose sum is σ = 206230752. Its totient is φ = 67924876.

The previous prime is 136668437. The next prime is 136668473. The reversal of 136668458 is 854866631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204260 + ... + 204927.

It is an arithmetic number, because the mean of its divisors is an integer number (25778844).

Almost surely, 2^136668458 is an apocalyptic number.

136668458 is a deficient number, since it is larger than the sum of its proper divisors (69562294).

136668458 is a wasteful number, since it uses less digits than its factorization.

136668458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409356.

The product of its digits is 829440, while the sum is 47.

The square root of 136668458 is about 11690.5285594793. The cubic root of 136668458 is about 515.0974874361.

The spelling of 136668458 in words is "one hundred thirty-six million, six hundred sixty-eight thousand, four hundred fifty-eight".