66387108 has 48 divisors (see below), whose sum is σ = 171158400. Its totient is φ = 19920384.

The previous prime is 66387107. The next prime is 66387109. The reversal of 66387108 is 80178366.

It is an interprime number because it is at equal distance from previous prime (66387107) and next prime (66387109).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66387103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2383 + ... + 11766.

It is an arithmetic number, because the mean of its divisors is an integer number (3565800).

Almost surely, 2^66387108 is an apocalyptic number.

66387108 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66387108 is an abundant number, since it is smaller than the sum of its proper divisors (104771292).

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

66387108 is a wasteful number, since it uses less digits than its factorization.

66387108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14196 (or 14194 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 66387108 is about 8147.8284223467. The cubic root of 66387108 is about 404.9125615229.

The spelling of 66387108 in words is "sixty-six million, three hundred eighty-seven thousand, one hundred eight".