66580803 has 6 divisors (see below), whose sum is σ = 96172284. Its totient is φ = 44387196.

The previous prime is 66580793. The next prime is 66580907. The reversal of 66580803 is 30808566.

It is not a de Polignac number, because 66580803 - 2⁶ = 66580739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66580103) 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 5 ways as a sum of consecutive naturals, for example, 3698925 + ... + 3698942.

It is an arithmetic number, because the mean of its divisors is an integer number (16028714).

Almost surely, 2^66580803 is an apocalyptic number.

66580803 is a deficient number, since it is larger than the sum of its proper divisors (29591481).

66580803 is a wasteful number, since it uses less digits than its factorization.

66580803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7397873 (or 7397870 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66580803 is about 8159.7060608823. The cubic root of 66580803 is about 405.3059781940.

The spelling of 66580803 in words is "sixty-six million, five hundred eighty thousand, eight hundred three".