16678298773 has 2 divisors, whose sum is σ = 16678298774. Its totient is φ = 16678298772.

The previous prime is 16678298761. The next prime is 16678298801. The reversal of 16678298773 is 37789287661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14184095409 + 2494203364 = 119097^2 + 49942^2 .

It is a cyclic number.

It is not a de Polignac number, because 16678298773 - 2⁹ = 16678298261 is a prime.

It is a super-2 number, since 2×16678298773² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16678298873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8339149386 + 8339149387.

It is an arithmetic number, because the mean of its divisors is an integer number (8339149387).

Almost surely, 2^16678298773 is an apocalyptic number.

It is an amenable number.

16678298773 is a deficient number, since it is larger than the sum of its proper divisors (1).

16678298773 is an equidigital number, since it uses as much as digits as its factorization.

16678298773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42674688, while the sum is 64.

The spelling of 16678298773 in words is "sixteen billion, six hundred seventy-eight million, two hundred ninety-eight thousand, seven hundred seventy-three".