3988039666 has 16 divisors (see below), whose sum is σ = 6445905984. Its totient is φ = 1839579984.

The previous prime is 3988039607. The next prime is 3988039691. The reversal of 3988039666 is 6669308893.

It is a self number, because there is not a number n which added to its sum of digits gives 3988039666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3345 + ... + 89371.

It is an arithmetic number, because the mean of its divisors is an integer number (402869124).

Almost surely, 2^3988039666 is an apocalyptic number.

3988039666 is a deficient number, since it is larger than the sum of its proper divisors (2457866318).

3988039666 is a wasteful number, since it uses less digits than its factorization.

3988039666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87825.

The product of its (nonzero) digits is 10077696, while the sum is 58.

The square root of 3988039666 is about 63150.9276733129. The cubic root of 3988039666 is about 1585.8173185216.

The spelling of 3988039666 in words is "three billion, nine hundred eighty-eight million, thirty-nine thousand, six hundred sixty-six".