66166700 has 36 divisors (see below), whose sum is σ = 145948992. Its totient is φ = 26030400.

The previous prime is 66166691. The next prime is 66166729. The reversal of 66166700 is 766166.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 677 + ... + 11523.

Almost surely, 2^66166700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66166700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72974496).

66166700 is an abundant number, since it is smaller than the sum of its proper divisors (79782292).

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

66166700 is a wasteful number, since it uses less digits than its factorization.

66166700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10922 (or 10915 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 66166700 is about 8134.2916102141. The cubic root of 66166700 is about 404.4639557624.

It can be divided in two parts, 66166 and 700, that added together give a palindrome (66866).

The spelling of 66166700 in words is "sixty-six million, one hundred sixty-six thousand, seven hundred".