16605651065 has 16 divisors (see below), whose sum is σ = 21082057920. Its totient is φ = 12521436480.

The previous prime is 16605651059. The next prime is 16605651091. The reversal of 16605651065 is 56015650661.

It is not a de Polignac number, because 16605651065 - 2¹⁴ = 16605634681 is a prime.

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, 424931 + ... + 462360.

It is an arithmetic number, because the mean of its divisors is an integer number (1317628620).

Almost surely, 2^16605651065 is an apocalyptic number.

It is an amenable number.

16605651065 is a deficient number, since it is larger than the sum of its proper divisors (4476406855).

16605651065 is a wasteful number, since it uses less digits than its factorization.

16605651065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887512.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 16605651065 in words is "sixteen billion, six hundred five million, six hundred fifty-one thousand, sixty-five".