16666666634 has 8 divisors (see below), whose sum is σ = 25001632260. Its totient is φ = 8332789216.

The previous prime is 16666666631. The next prime is 16666666697. The reversal of 16666666634 is 43666666661.

It can be written as a sum of positive squares in 2 ways, for example, as 14550390625 + 2116276009 = 120625^2 + 46003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16666666634.

It is not an unprimeable number, because it can be changed into a prime (16666666631) 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, 232619 + ... + 295710.

Almost surely, 2^16666666634 is an apocalyptic number.

16666666634 is a deficient number, since it is larger than the sum of its proper divisors (8334965626).

16666666634 is a wasteful number, since it uses less digits than its factorization.

16666666634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544104.

The product of its digits is 20155392, while the sum is 56.

The spelling of 16666666634 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred thirty-four".