66890370228 has 48 divisors (see below), whose sum is σ = 174868204224. Its totient is φ = 19721975040.

The previous prime is 66890370179. The next prime is 66890370233. The reversal of 66890370228 is 82207309866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6843025 + ... + 6852792.

It is an arithmetic number, because the mean of its divisors is an integer number (3643087588).

Almost surely, 2^66890370228 is an apocalyptic number.

It is an amenable number.

66890370228 is an abundant number, since it is smaller than the sum of its proper divisors (107977833996).

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

66890370228 is a wasteful number, since it uses less digits than its factorization.

66890370228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13695872 (or 13695870 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 66890370228 in words is "sixty-six billion, eight hundred ninety million, three hundred seventy thousand, two hundred twenty-eight".