16673321377 has 2 divisors, whose sum is σ = 16673321378. Its totient is φ = 16673321376.

The previous prime is 16673321333. The next prime is 16673321383. The reversal of 16673321377 is 77312337661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16669650321 + 3671056 = 129111^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 16673321377 - 2¹⁵ = 16673288609 is a prime.

It is a super-2 number, since 2×16673321377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16673321177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8336660688 + 8336660689.

It is an arithmetic number, because the mean of its divisors is an integer number (8336660689).

Almost surely, 2^16673321377 is an apocalyptic number.

It is an amenable number.

16673321377 is a deficient number, since it is larger than the sum of its proper divisors (1).

16673321377 is an equidigital number, since it uses as much as digits as its factorization.

16673321377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 46.

The spelling of 16673321377 in words is "sixteen billion, six hundred seventy-three million, three hundred twenty-one thousand, three hundred seventy-seven".