136666260 has 72 divisors (see below), whose sum is σ = 416202696. Its totient is φ = 36299520.

The previous prime is 136666249. The next prime is 136666261. The reversal of 136666260 is 62666631.

It can be written as a sum of positive squares in 4 ways, for example, as 197136 + 136469124 = 444^2 + 11682^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136666261) 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 23 ways as a sum of consecutive naturals, for example, 48490 + ... + 51230.

It is an arithmetic number, because the mean of its divisors is an integer number (5780593).

Almost surely, 2^136666260 is an apocalyptic number.

136666260 is a gapful number since it is divisible by the number (10) 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 136666260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208101348).

136666260 is an abundant number, since it is smaller than the sum of its proper divisors (279536436).

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

136666260 is a wasteful number, since it uses less digits than its factorization.

136666260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033 (or 3028 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 136666260 is about 11690.4345513758. The cubic root of 136666260 is about 515.0947260324.

The spelling of 136666260 in words is "one hundred thirty-six million, six hundred sixty-six thousand, two hundred sixty".