66755128 has 32 divisors (see below), whose sum is σ = 137032560. Its totient is φ = 30234880.

The previous prime is 66755099. The next prime is 66755149. The reversal of 66755128 is 82155766.

It is a super-2 number, since 2×66755128² = 8912494228592768, which contains 22 as substring.

It is a congruent number.

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, 26700 + ... + 29092.

Almost surely, 2^66755128 is an apocalyptic number.

It is an amenable number.

66755128 is an abundant number, since it is smaller than the sum of its proper divisors (70277432).

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

66755128 is a wasteful number, since it uses less digits than its factorization.

66755128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727 (or 2723 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 66755128 is about 8170.3811416604. The cubic root of 66755128 is about 405.6594003365.

The spelling of 66755128 in words is "sixty-six million, seven hundred fifty-five thousand, one hundred twenty-eight".