135557666 has 24 divisors (see below), whose sum is σ = 215944704. Its totient is φ = 63810360.

The previous prime is 135557659. The next prime is 135557701. The reversal of 135557666 is 666755531.

It is a super-2 number, since 2×135557666² = 36751761622735112, which contains 22 as substring.

It is a Curzon number.

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, 137411 + ... + 138393.

It is an arithmetic number, because the mean of its divisors is an integer number (8997696).

Almost surely, 2^135557666 is an apocalyptic number.

135557666 is a deficient number, since it is larger than the sum of its proper divisors (80387038).

135557666 is a wasteful number, since it uses less digits than its factorization.

135557666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1195 counting only the distinct ones).

The product of its digits is 567000, while the sum is 44.

The square root of 135557666 is about 11642.9234301356. The cubic root of 135557666 is about 513.6981805920.

The spelling of 135557666 in words is "one hundred thirty-five million, five hundred fifty-seven thousand, six hundred sixty-six".