3888696665 has 32 divisors (see below), whose sum is σ = 5388042240. Its totient is φ = 2639173824.

The previous prime is 3888696659. The next prime is 3888696673. The reversal of 3888696665 is 5666968883.

It is not a de Polignac number, because 3888696665 - 2⁶ = 3888696601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1862252 + ... + 1864338.

It is an arithmetic number, because the mean of its divisors is an integer number (168376320).

Almost surely, 2^3888696665 is an apocalyptic number.

3888696665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3888696665 is a deficient number, since it is larger than the sum of its proper divisors (1499345575).

3888696665 is a wasteful number, since it uses less digits than its factorization.

3888696665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621.

The product of its digits is 89579520, while the sum is 65.

The square root of 3888696665 is about 62359.4152073286. The cubic root of 3888696665 is about 1572.5387495791.

The spelling of 3888696665 in words is "three billion, eight hundred eighty-eight million, six hundred ninety-six thousand, six hundred sixty-five".