16766066761 has 4 divisors (see below), whose sum is σ = 16932067524. Its totient is φ = 16600066000.

The previous prime is 16766066711. The next prime is 16766066777.

16766066761 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15606255625 + 1159811136 = 124925^2 + 34056^2 .

It is a cyclic number.

It is not a de Polignac number, because 16766066761 - 2¹⁵ = 16766033993 is a prime.

It is a super-2 number, since 2×16766066761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16766066699 and 16766066708.

It is not an unprimeable number, because it can be changed into a prime (16766066711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83000230 + ... + 83000431.

It is an arithmetic number, because the mean of its divisors is an integer number (4233016881).

Almost surely, 2^16766066761 is an apocalyptic number.

It is an amenable number.

16766066761 is a deficient number, since it is larger than the sum of its proper divisors (166000763).

16766066761 is a wasteful number, since it uses less digits than its factorization.

16766066761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166000762.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 16766066761 in words is "sixteen billion, seven hundred sixty-six million, sixty-six thousand, seven hundred sixty-one".