16665330265 has 16 divisors (see below), whose sum is σ = 21625304832. Its totient is φ = 12281031424.

The previous prime is 16665330263. The next prime is 16665330277. The reversal of 16665330265 is 56203356661.

It is a cyclic number.

It is not a de Polignac number, because 16665330265 - 2¹ = 16665330263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16665330263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2081779 + ... + 2089768.

It is an arithmetic number, because the mean of its divisors is an integer number (1351581552).

Almost surely, 2^16665330265 is an apocalyptic number.

It is an amenable number.

16665330265 is a deficient number, since it is larger than the sum of its proper divisors (4959974567).

16665330265 is a wasteful number, since it uses less digits than its factorization.

16665330265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171616.

The product of its (nonzero) digits is 583200, while the sum is 43.

The spelling of 16665330265 in words is "sixteen billion, six hundred sixty-five million, three hundred thirty thousand, two hundred sixty-five".