16700518066 has 4 divisors (see below), whose sum is σ = 25050777102. Its totient is φ = 8350259032.

The previous prime is 16700518039. The next prime is 16700518067. The reversal of 16700518066 is 66081500761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66081500761 = 41 ⋅1611743921.

It can be written as a sum of positive squares in only one way, i.e., 15369800625 + 1330717441 = 123975^2 + 36479^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16700518067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4175129515 + ... + 4175129518.

Almost surely, 2^16700518066 is an apocalyptic number.

16700518066 is a deficient number, since it is larger than the sum of its proper divisors (8350259036).

16700518066 is an equidigital number, since it uses as much as digits as its factorization.

16700518066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8350259035.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 16700518066 in words is "sixteen billion, seven hundred million, five hundred eighteen thousand, sixty-six".