3916660638 has 16 divisors (see below), whose sum is σ = 8545441536. Its totient is φ = 1186866840.

The previous prime is 3916660609. The next prime is 3916660673. The reversal of 3916660638 is 8360666193.

It is a Curzon number.

It is a congruent number.

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, 29671606 + ... + 29671737.

It is an arithmetic number, because the mean of its divisors is an integer number (534090096).

Almost surely, 2^3916660638 is an apocalyptic number.

3916660638 is an abundant number, since it is smaller than the sum of its proper divisors (4628780898).

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

3916660638 is a wasteful number, since it uses less digits than its factorization.

3916660638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59343359.

The product of its (nonzero) digits is 839808, while the sum is 48.

The square root of 3916660638 is about 62583.2296865542. The cubic root of 3916660638 is about 1576.2991733547.

The spelling of 3916660638 in words is "three billion, nine hundred sixteen million, six hundred sixty thousand, six hundred thirty-eight".