66887500 has 36 divisors (see below), whose sum is σ = 146334384. Its totient is φ = 26750000.

The previous prime is 66887497. The next prime is 66887501. The reversal of 66887500 is 578866.

It is not an unprimeable number, because it can be changed into a prime (66887501) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9825 + ... + 15175.

It is an arithmetic number, because the mean of its divisors is an integer number (4064844).

Almost surely, 2^66887500 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 66887500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73167192).

66887500 is an abundant number, since it is smaller than the sum of its proper divisors (79446884).

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

66887500 is an equidigital number, since it uses as much as digits as its factorization.

66887500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5380 (or 5358 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 66887500 is about 8178.4778534884. The cubic root of 66887500 is about 405.9273572380.

The spelling of 66887500 in words is "sixty-six million, eight hundred eighty-seven thousand, five hundred".