135663966 has 12 divisors (see below), whose sum is σ = 293938632. Its totient is φ = 45221316.

The previous prime is 135663947. The next prime is 135663973. The reversal of 135663966 is 669366531.

135663966 is a `hidden beast` number, since 1 + 3 + 5 + 6 + 639 + 6 + 6 = 666.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 3768426 + ... + 3768461.

It is an arithmetic number, because the mean of its divisors is an integer number (24494886).

Almost surely, 2^135663966 is an apocalyptic number.

135663966 is an abundant number, since it is smaller than the sum of its proper divisors (158274666).

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

135663966 is a wasteful number, since it uses less digits than its factorization.

135663966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7536895 (or 7536892 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 135663966 is about 11647.4875402380. The cubic root of 135663966 is about 513.8324207546.

The spelling of 135663966 in words is "one hundred thirty-five million, six hundred sixty-three thousand, nine hundred sixty-six".