66220924 has 48 divisors (see below), whose sum is σ = 146684160. Its totient is φ = 25407360.

The previous prime is 66220907. The next prime is 66220937. The reversal of 66220924 is 42902266.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 19032 + ... + 22240.

It is an arithmetic number, because the mean of its divisors is an integer number (3055920).

Almost surely, 2^66220924 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 66220924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73342080).

66220924 is an abundant number, since it is smaller than the sum of its proper divisors (80463236).

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

66220924 is a wasteful number, since it uses less digits than its factorization.

66220924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298 (or 3296 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 66220924 is about 8137.6239775502. The cubic root of 66220924 is about 404.5744124585.

The spelling of 66220924 in words is "sixty-six million, two hundred twenty thousand, nine hundred twenty-four".