66035690728 has 16 divisors (see below), whose sum is σ = 141505051680. Its totient is φ = 28301010288.

The previous prime is 66035690687. The next prime is 66035690753. The reversal of 66035690728 is 82709653066.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589604326 + ... + 589604437.

It is an arithmetic number, because the mean of its divisors is an integer number (8844065730).

Almost surely, 2^66035690728 is an apocalyptic number.

It is an amenable number.

66035690728 is an abundant number, since it is smaller than the sum of its proper divisors (75469360952).

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

66035690728 is a wasteful number, since it uses less digits than its factorization.

66035690728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179208776 (or 1179208772 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 66035690728 in words is "sixty-six billion, thirty-five million, six hundred ninety thousand, seven hundred twenty-eight".