136665418 has 12 divisors (see below), whose sum is σ = 207644850. Its totient is φ = 67461576.

The previous prime is 136665413. The next prime is 136665427. The reversal of 136665418 is 814566631.

It can be written as a sum of positive squares in only one way, i.e., 134861769 + 1803649 = 11613^2 + 1343^2 .

It is a super-2 number, since 2×136665418² = 37354872954229448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136665413) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 7008 + ... + 17956.

Almost surely, 2^136665418 is an apocalyptic number.

136665418 is a deficient number, since it is larger than the sum of its proper divisors (70979432).

136665418 is an equidigital number, since it uses as much as digits as its factorization.

136665418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11109 (or 11030 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 136665418 is about 11690.3985389721. The cubic root of 136665418 is about 515.0936681984.

The spelling of 136665418 in words is "one hundred thirty-six million, six hundred sixty-five thousand, four hundred eighteen".