136781660 has 24 divisors (see below), whose sum is σ = 304138800. Its totient is φ = 51494144.

The previous prime is 136781657. The next prime is 136781683. The reversal of 136781660 is 66187631.

136781660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200810 + ... + 201489.

It is an arithmetic number, because the mean of its divisors is an integer number (12672450).

Almost surely, 2^136781660 is an apocalyptic number.

136781660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136781660 is an abundant number, since it is smaller than the sum of its proper divisors (167357140).

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

136781660 is a wasteful number, since it uses less digits than its factorization.

136781660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402325 (or 402323 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 136781660 is about 11695.3691690344. The cubic root of 136781660 is about 515.2396659965.

The spelling of 136781660 in words is "one hundred thirty-six million, seven hundred eighty-one thousand, six hundred sixty".