66552170 has 16 divisors (see below), whose sum is σ = 120058848. Its totient is φ = 26562000.

The previous prime is 66552163. The next prime is 66552173. The reversal of 66552170 is 7125566.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66552173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2456 + ... + 11795.

It is an arithmetic number, because the mean of its divisors is an integer number (7503678).

Almost surely, 2^66552170 is an apocalyptic number.

66552170 is a deficient number, since it is larger than the sum of its proper divisors (53506678).

66552170 is a wasteful number, since it uses less digits than its factorization.

66552170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14725.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 66552170 is about 8157.9513359666. The cubic root of 66552170 is about 405.2478694022.

The spelling of 66552170 in words is "sixty-six million, five hundred fifty-two thousand, one hundred seventy".