1666624008 has 64 divisors (see below), whose sum is σ = 4851653760. Its totient is φ = 467191296.

The previous prime is 1666623991. The next prime is 1666624021. The reversal of 1666624008 is 8004266661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84685 + ... + 102492.

It is an arithmetic number, because the mean of its divisors is an integer number (75807090).

Almost surely, 2^1666624008 is an apocalyptic number.

It is an amenable number.

1666624008 is an abundant number, since it is smaller than the sum of its proper divisors (3185029752).

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

1666624008 is a wasteful number, since it uses less digits than its factorization.

1666624008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187246 (or 187242 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1666624008 is about 40824.3065832109. The cubic root of 1666624008 is about 1185.6209859220.

The spelling of 1666624008 in words is "one billion, six hundred sixty-six million, six hundred twenty-four thousand, eight".