135541615666 has 16 divisors (see below), whose sum is σ = 206508090240. Its totient is φ = 66710769840.

The previous prime is 135541615637. The next prime is 135541615679. The reversal of 135541615666 is 666516145531.

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, 1243561 + ... + 1348156.

It is an arithmetic number, because the mean of its divisors is an integer number (12906755640).

Almost surely, 2^135541615666 is an apocalyptic number.

135541615666 is a deficient number, since it is larger than the sum of its proper divisors (70966474574).

135541615666 is a wasteful number, since it uses less digits than its factorization.

135541615666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592129.

The product of its digits is 1944000, while the sum is 49.

The spelling of 135541615666 in words is "one hundred thirty-five billion, five hundred forty-one million, six hundred fifteen thousand, six hundred sixty-six".