66166210 has 64 divisors (see below), whose sum is σ = 141087744. Its totient is φ = 22067200.

The previous prime is 66166201. The next prime is 66166223. The reversal of 66166210 is 1266166.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76239 + ... + 77101.

It is an arithmetic number, because the mean of its divisors is an integer number (2204496).

Almost surely, 2^66166210 is an apocalyptic number.

66166210 is an abundant number, since it is smaller than the sum of its proper divisors (74921534).

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

66166210 is a wasteful number, since it uses less digits than its factorization.

66166210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 66166210 is about 8134.2614907562. The cubic root of 66166210 is about 404.4629573355.

The spelling of 66166210 in words is "sixty-six million, one hundred sixty-six thousand, two hundred ten".