66728134802 has 16 divisors (see below), whose sum is σ = 115523675712. Its totient is φ = 28314625200.

The previous prime is 66728134799. The next prime is 66728134813. The reversal of 66728134802 is 20843182766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23594108 + ... + 23596935.

It is an arithmetic number, because the mean of its divisors is an integer number (7220229732).

Almost surely, 2^66728134802 is an apocalyptic number.

66728134802 is a deficient number, since it is larger than the sum of its proper divisors (48795540910).

66728134802 is a wasteful number, since it uses less digits than its factorization.

66728134802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47191153.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 66728134802 in words is "sixty-six billion, seven hundred twenty-eight million, one hundred thirty-four thousand, eight hundred two".