16666666455 has 8 divisors (see below), whose sum is σ = 26666666352. Its totient is φ = 8888888768.

The previous prime is 16666666439. The next prime is 16666666459. The reversal of 16666666455 is 55466666661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16666666455 - 2⁴ = 16666666439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16666666395 and 16666666404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666666459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555555534 + ... + 555555563.

It is an arithmetic number, because the mean of its divisors is an integer number (3333333294).

Almost surely, 2^16666666455 is an apocalyptic number.

16666666455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16666666455 is a deficient number, since it is larger than the sum of its proper divisors (9999999897).

16666666455 is a wasteful number, since it uses less digits than its factorization.

16666666455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111111105.

The product of its digits is 27993600, while the sum is 57.

The spelling of 16666666455 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, four hundred fifty-five".