136660780 has 12 divisors (see below), whose sum is σ = 286987680. Its totient is φ = 54664304.

The previous prime is 136660747. The next prime is 136660817. The reversal of 136660780 is 87066631.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3416500 + ... + 3416539.

It is an arithmetic number, because the mean of its divisors is an integer number (23915640).

Almost surely, 2^136660780 is an apocalyptic number.

136660780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136660780 is an abundant number, since it is smaller than the sum of its proper divisors (150326900).

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

136660780 is a wasteful number, since it uses less digits than its factorization.

136660780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6833048 (or 6833046 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 136660780 is about 11690.2001693726. The cubic root of 136660780 is about 515.0878412392.

The spelling of 136660780 in words is "one hundred thirty-six million, six hundred sixty thousand, seven hundred eighty".