136666368 has 108 divisors (see below), whose sum is σ = 411334560. Its totient is φ = 43557888.

The previous prime is 136666363. The next prime is 136666379. The reversal of 136666368 is 863666631.

It is a happy number.

It is a super-2 number, since 2×136666368² = 37355392284622848, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136666363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51703 + ... + 54281.

Almost surely, 2^136666368 is an apocalyptic number.

136666368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136666368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205667280).

136666368 is an abundant number, since it is smaller than the sum of its proper divisors (274668192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136666368 is a wasteful number, since it uses less digits than its factorization.

136666368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624 (or 2607 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 136666368 is about 11690.4391705359. The cubic root of 136666368 is about 515.0948617163.

The spelling of 136666368 in words is "one hundred thirty-six million, six hundred sixty-six thousand, three hundred sixty-eight".