4001666699 has 8 divisors (see below), whose sum is σ = 4043170560. Its totient is φ = 3960214056.

The previous prime is 4001666693. The next prime is 4001666743. The reversal of 4001666699 is 9966661004.

4001666699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4001666699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001666693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155642 + ... + 179520.

It is an arithmetic number, because the mean of its divisors is an integer number (505396320).

Almost surely, 2^4001666699 is an apocalyptic number.

4001666699 is a deficient number, since it is larger than the sum of its proper divisors (41503861).

4001666699 is a wasteful number, since it uses less digits than its factorization.

4001666699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25609.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 4001666699 is about 63258.7282436187. The cubic root of 4001666699 is about 1587.6214979984.

The spelling of 4001666699 in words is "four billion, one million, six hundred sixty-six thousand, six hundred ninety-nine".