135556866 has 24 divisors (see below), whose sum is σ = 298686960. Its totient is φ = 44419416.

The previous prime is 135556859. The next prime is 135556891. The reversal of 135556866 is 668655531.

135556866 is a `hidden beast` number, since 1 + 35 + 556 + 8 + 66 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62760 + ... + 64883.

It is an arithmetic number, because the mean of its divisors is an integer number (12445290).

Almost surely, 2^135556866 is an apocalyptic number.

135556866 is an abundant number, since it is smaller than the sum of its proper divisors (163130094).

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

135556866 is a wasteful number, since it uses less digits than its factorization.

135556866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127710 (or 127707 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 135556866 is about 11642.8890744523. The cubic root of 135556866 is about 513.6971700520.

The spelling of 135556866 in words is "one hundred thirty-five million, five hundred fifty-six thousand, eight hundred sixty-six".