136665454 has 4 divisors (see below), whose sum is σ = 204998184. Its totient is φ = 68332726.

The previous prime is 136665433. The next prime is 136665491. The reversal of 136665454 is 454566631.

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

It is a super-2 number, since 2×136665454² = 37354892634052232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 34166362 + ... + 34166365.

It is an arithmetic number, because the mean of its divisors is an integer number (51249546).

Almost surely, 2^136665454 is an apocalyptic number.

136665454 is a deficient number, since it is larger than the sum of its proper divisors (68332730).

136665454 is an equidigital number, since it uses as much as digits as its factorization.

136665454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68332729.

The product of its digits is 259200, while the sum is 40.

The square root of 136665454 is about 11690.4000786971. The cubic root of 136665454 is about 515.0937134265.

The spelling of 136665454 in words is "one hundred thirty-six million, six hundred sixty-five thousand, four hundred fifty-four".