66755900 has 18 divisors (see below), whose sum is σ = 144860520. Its totient is φ = 26702320.

The previous prime is 66755861. The next prime is 66755903. The reversal of 66755900 is 955766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66755903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333680 + ... + 333879.

Almost surely, 2^66755900 is an apocalyptic number.

It is an amenable number.

66755900 is an abundant number, since it is smaller than the sum of its proper divisors (78104620).

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

66755900 is a wasteful number, since it uses less digits than its factorization.

66755900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667573 (or 667566 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 66755900 is about 8170.4283853419. The cubic root of 66755900 is about 405.6609641008.

The spelling of 66755900 in words is "sixty-six million, seven hundred fifty-five thousand, nine hundred".