16664549723 has 2 divisors, whose sum is σ = 16664549724. Its totient is φ = 16664549722.

The previous prime is 16664549687. The next prime is 16664549771. The reversal of 16664549723 is 32794546661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16664549723 - 2¹⁰ = 16664548699 is a prime.

It is not a weakly prime, because it can be changed into another prime (16664549623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332274861 + 8332274862.

It is an arithmetic number, because the mean of its divisors is an integer number (8332274862).

Almost surely, 2^16664549723 is an apocalyptic number.

16664549723 is a deficient number, since it is larger than the sum of its proper divisors (1).

16664549723 is an equidigital number, since it uses as much as digits as its factorization.

16664549723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 53.

The spelling of 16664549723 in words is "sixteen billion, six hundred sixty-four million, five hundred forty-nine thousand, seven hundred twenty-three".