16665354403 has 2 divisors, whose sum is σ = 16665354404. Its totient is φ = 16665354402.

The previous prime is 16665354389. The next prime is 16665354427. The reversal of 16665354403 is 30445356661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16665354403 - 2¹⁷ = 16665223331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16665354403.

It is not a weakly prime, because it can be changed into another prime (16665354103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332677201 + 8332677202.

It is an arithmetic number, because the mean of its divisors is an integer number (8332677202).

Almost surely, 2^16665354403 is an apocalyptic number.

16665354403 is a deficient number, since it is larger than the sum of its proper divisors (1).

16665354403 is an equidigital number, since it uses as much as digits as its factorization.

16665354403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 16665354403 in words is "sixteen billion, six hundred sixty-five million, three hundred fifty-four thousand, four hundred three".