16766684426 has 4 divisors (see below), whose sum is σ = 25150026642. Its totient is φ = 8383342212.

The previous prime is 16766684413. The next prime is 16766684471. The reversal of 16766684426 is 62448666761.

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

It can be written as a sum of positive squares in only one way, i.e., 11119913401 + 5646771025 = 105451^2 + 75145^2 .

It is a super-2 number, since 2×16766684426² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4191671105 + ... + 4191671108.

Almost surely, 2^16766684426 is an apocalyptic number.

16766684426 is a deficient number, since it is larger than the sum of its proper divisors (8383342216).

16766684426 is an equidigital number, since it uses as much as digits as its factorization.

16766684426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8383342215.

The product of its digits is 13934592, while the sum is 56.

The spelling of 16766684426 in words is "sixteen billion, seven hundred sixty-six million, six hundred eighty-four thousand, four hundred twenty-six".