135666680233578 has 32 divisors (see below), whose sum is σ = 292206145189056. Its totient is φ = 41743452809088.

The previous prime is 135666680233549. The next prime is 135666680233597. The reversal of 135666680233578 is 875332086666531.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21585750 + ... + 27152862.

It is an arithmetic number, because the mean of its divisors is an integer number (9131442037158).

Almost surely, 2^{135666680233578} is an apocalyptic number.

135666680233578 is an abundant number, since it is smaller than the sum of its proper divisors (156539464955478).

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

135666680233578 is a wasteful number, since it uses less digits than its factorization.

135666680233578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879558.

The product of its (nonzero) digits is 783820800, while the sum is 69.

The spelling of 135666680233578 in words is "one hundred thirty-five trillion, six hundred sixty-six billion, six hundred eighty million, two hundred thirty-three thousand, five hundred seventy-eight".