66872210 has 16 divisors (see below), whose sum is σ = 126705600. Its totient is φ = 25340976.

The previous prime is 66872147. The next prime is 66872227. The reversal of 66872210 is 1227866.

It is a Curzon 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, 175790 + ... + 176169.

It is an arithmetic number, because the mean of its divisors is an integer number (7919100).

Almost surely, 2^66872210 is an apocalyptic number.

66872210 is a deficient number, since it is larger than the sum of its proper divisors (59833390).

66872210 is a wasteful number, since it uses less digits than its factorization.

66872210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351985.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 66872210 is about 8177.5430295413. The cubic root of 66872210 is about 405.8964241923.

The spelling of 66872210 in words is "sixty-six million, eight hundred seventy-two thousand, two hundred ten".