66606750 has 96 divisors (see below), whose sum is σ = 205882560. Its totient is φ = 15220800.

The previous prime is 66606737. The next prime is 66606767. The reversal of 66606750 is 5760666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13636 + ... + 17864.

It is an arithmetic number, because the mean of its divisors is an integer number (2144610).

Almost surely, 2^66606750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66606750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102941280).

66606750 is an abundant number, since it is smaller than the sum of its proper divisors (139275810).

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

66606750 is a wasteful number, since it uses less digits than its factorization.

66606750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259 (or 4246 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 66606750 is about 8161.2958529881. The cubic root of 66606750 is about 405.3586215383.

The spelling of 66606750 in words is "sixty-six million, six hundred six thousand, seven hundred fifty".