136665616 has 20 divisors (see below), whose sum is σ = 266167612. Its totient is φ = 67977216.

The previous prime is 136665611. The next prime is 136665629. The reversal of 136665616 is 616566631.

It can be written as a sum of positive squares in 2 ways, for example, as 87609600 + 49056016 = 9360^2 + 7004^2 .

It is not an unprimeable number, because it can be changed into a prime (136665611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19041 + ... + 25216.

Almost surely, 2^136665616 is an apocalyptic number.

136665616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

136665616 is a deficient number, since it is larger than the sum of its proper divisors (129501996).

136665616 is a wasteful number, since it uses less digits than its factorization.

136665616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44458 (or 44452 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 136665616 is about 11690.4070074570. The cubic root of 136665616 is about 515.0939169531.

The spelling of 136665616 in words is "one hundred thirty-six million, six hundred sixty-five thousand, six hundred sixteen".