66219936 has 96 divisors (see below), whose sum is σ = 181254528. Its totient is φ = 21150720.

The previous prime is 66219929. The next prime is 66219971. The reversal of 66219936 is 63991266.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365766 + ... + 365946.

It is an arithmetic number, because the mean of its divisors is an integer number (1888068).

Almost surely, 2^66219936 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 66219936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90627264).

66219936 is an abundant number, since it is smaller than the sum of its proper divisors (115034592).

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

66219936 is a wasteful number, since it uses less digits than its factorization.

66219936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 326 counting only the distinct ones).

The product of its digits is 104976, while the sum is 42.

The square root of 66219936 is about 8137.5632716434. The cubic root of 66219936 is about 404.5724003980.

The spelling of 66219936 in words is "sixty-six million, two hundred nineteen thousand, nine hundred thirty-six".