16506426666 has 8 divisors (see below), whose sum is σ = 33012853344. Its totient is φ = 5502142220.

The previous prime is 16506426619. The next prime is 16506426679. The reversal of 16506426666 is 66662460561.

It is a happy number.

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

16506426666 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1375535550 + ... + 1375535561.

It is an arithmetic number, because the mean of its divisors is an integer number (4126606668).

Almost surely, 2^16506426666 is an apocalyptic number.

16506426666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16506426666 is a wasteful number, since it uses less digits than its factorization.

16506426666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751071116.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 16506426666 in words is "sixteen billion, five hundred six million, four hundred twenty-six thousand, six hundred sixty-six".