16327421511666 has 16 divisors (see below), whose sum is σ = 32657090142144. Its totient is φ = 5442099317424.

The previous prime is 16327421511617. The next prime is 16327421511697. The reversal of 16327421511666 is 66611512472361.

It is a super-2 number, since 2×16327421511666² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93535486 + ... + 93709881.

It is an arithmetic number, because the mean of its divisors is an integer number (2041068133884).

Almost surely, 2^{16327421511666} is an apocalyptic number.

16327421511666 is an abundant number, since it is smaller than the sum of its proper divisors (16329668630478).

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

16327421511666 is a wasteful number, since it uses less digits than its factorization.

16327421511666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187259905.

The product of its digits is 2177280, while the sum is 51.

The spelling of 16327421511666 in words is "sixteen trillion, three hundred twenty-seven billion, four hundred twenty-one million, five hundred eleven thousand, six hundred sixty-six".