66885320 has 32 divisors (see below), whose sum is σ = 158414400. Its totient is φ = 25345728.

The previous prime is 66885211. The next prime is 66885349. The reversal of 66885320 is 2358866.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 43244 + ... + 44763.

It is an arithmetic number, because the mean of its divisors is an integer number (4950450).

Almost surely, 2^66885320 is an apocalyptic number.

It is an amenable number.

66885320 is an abundant number, since it is smaller than the sum of its proper divisors (91529080).

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

66885320 is a wasteful number, since it uses less digits than its factorization.

66885320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88037 (or 88033 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 66885320 is about 8178.3445757684. The cubic root of 66885320 is about 405.9229471900.

The spelling of 66885320 in words is "sixty-six million, eight hundred eighty-five thousand, three hundred twenty".