16665330239 has 2 divisors, whose sum is σ = 16665330240. Its totient is φ = 16665330238.

The previous prime is 16665330221. The next prime is 16665330263. The reversal of 16665330239 is 93203356661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16665330239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16665330239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16665336239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332665119 + 8332665120.

It is an arithmetic number, because the mean of its divisors is an integer number (8332665120).

Almost surely, 2^16665330239 is an apocalyptic number.

16665330239 is a deficient number, since it is larger than the sum of its proper divisors (1).

16665330239 is an equidigital number, since it uses as much as digits as its factorization.

16665330239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 44.

The spelling of 16665330239 in words is "sixteen billion, six hundred sixty-five million, three hundred thirty thousand, two hundred thirty-nine".