66169320 has 128 divisors (see below), whose sum is σ = 233107200. Its totient is φ = 14708736.

The previous prime is 66169309. The next prime is 66169333. The reversal of 66169320 is 2396166.

It is a happy number.

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, 30016 + ... + 32144.

It is an arithmetic number, because the mean of its divisors is an integer number (1821150).

Almost surely, 2^66169320 is an apocalyptic number.

66169320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66169320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116553600).

66169320 is an abundant number, since it is smaller than the sum of its proper divisors (166937880).

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

66169320 is a wasteful number, since it uses less digits than its factorization.

66169320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 66169320 is about 8134.4526552190. The cubic root of 66169320 is about 404.4692942059.

The spelling of 66169320 in words is "sixty-six million, one hundred sixty-nine thousand, three hundred twenty".