66728470010 has 32 divisors (see below), whose sum is σ = 122924329920. Its totient is φ = 26073486208.

The previous prime is 66728470001. The next prime is 66728470049. The reversal of 66728470010 is 1007482766.

It is a self number, because there is not a number n which added to its sum of digits gives 66728470010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377792 + ... + 525531.

It is an arithmetic number, because the mean of its divisors is an integer number (3841385310).

Almost surely, 2^66728470010 is an apocalyptic number.

66728470010 is a deficient number, since it is larger than the sum of its proper divisors (56195859910).

66728470010 is a wasteful number, since it uses less digits than its factorization.

66728470010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903502.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 66728470010 in words is "sixty-six billion, seven hundred twenty-eight million, four hundred seventy thousand, ten".