16665000064 has 16 divisors (see below), whose sum is σ = 33199805070. Its totient is φ = 8332499968.

The previous prime is 16665000041. The next prime is 16665000167. The reversal of 16665000064 is 46000056661.

It can be written as a sum of positive squares in only one way, i.e., 15473369664 + 1191630400 = 124392^2 + 34520^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 16664999993 and 16665000029.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65097529 + ... + 65097784.

Almost surely, 2^16665000064 is an apocalyptic number.

It is an amenable number.

16665000064 is a deficient number, since it is larger than the sum of its proper divisors (16534805006).

16665000064 is an equidigital number, since it uses as much as digits as its factorization.

16665000064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130195327 (or 130195315 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 16665000064 in words is "sixteen billion, six hundred sixty-five million, sixty-four", and thus it is an aban number.