16135644666 has 8 divisors (see below), whose sum is σ = 32271289344. Its totient is φ = 5378548220.

The previous prime is 16135644659. The next prime is 16135644667. The reversal of 16135644666 is 66644653161.

It is a sphenic number, since it is the product of 3 distinct primes.

16135644666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (16135644667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344637050 + ... + 1344637061.

It is an arithmetic number, because the mean of its divisors is an integer number (4033911168).

Almost surely, 2^16135644666 is an apocalyptic number.

16135644666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16135644666 is a wasteful number, since it uses less digits than its factorization.

16135644666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689274116.

The product of its digits is 1866240, while the sum is 48.

The spelling of 16135644666 in words is "sixteen billion, one hundred thirty-five million, six hundred forty-four thousand, six hundred sixty-six".