66880008 has 48 divisors (see below), whose sum is σ = 195069420. Its totient is φ = 20578176.

The previous prime is 66880001. The next prime is 66880031. The reversal of 66880008 is 80008866.

It can be written as a sum of positive squares in 2 ways, for example, as 66879684 + 324 = 8178^2 + 18^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66880001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34791 + ... + 36662.

Almost surely, 2^66880008 is an apocalyptic number.

It is an amenable number.

66880008 is an abundant number, since it is smaller than the sum of its proper divisors (128189412).

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

66880008 is a wasteful number, since it uses less digits than its factorization.

66880008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71478 (or 71471 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 66880008 is about 8178.0198092203. The cubic root of 66880008 is about 405.9122008370.

The spelling of 66880008 in words is "sixty-six million, eight hundred eighty thousand, eight".