2108447666 has 16 divisors (see below), whose sum is σ = 3453928128. Its totient is φ = 959422800.

The previous prime is 2108447657. The next prime is 2108447687. The reversal of 2108447666 is 6667448012.

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 7 ways as a sum of consecutive naturals, for example, 569240 + ... + 572931.

It is an arithmetic number, because the mean of its divisors is an integer number (215870508).

Almost surely, 2^2108447666 is an apocalyptic number.

2108447666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2108447666 is a deficient number, since it is larger than the sum of its proper divisors (1345480462).

2108447666 is a wasteful number, since it uses less digits than its factorization.

2108447666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142257.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 2108447666 is about 45917.8360335066. The cubic root of 2108447666 is about 1282.2939954131.

The spelling of 2108447666 in words is "two billion, one hundred eight million, four hundred forty-seven thousand, six hundred sixty-six".