3871991662 has 48 divisors (see below), whose sum is σ = 7391271168. Its totient is φ = 1504303920.

The previous prime is 3871991657. The next prime is 3871991699. The reversal of 3871991662 is 2661991783.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390733 + ... + 400519.

It is an arithmetic number, because the mean of its divisors is an integer number (153984816).

Almost surely, 2^3871991662 is an apocalyptic number.

3871991662 is a deficient number, since it is larger than the sum of its proper divisors (3519279506).

3871991662 is a wasteful number, since it uses less digits than its factorization.

3871991662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10181 (or 10174 counting only the distinct ones).

The product of its digits is 979776, while the sum is 52.

The square root of 3871991662 is about 62225.3297460126. The cubic root of 3871991662 is about 1570.2837549519.

The spelling of 3871991662 in words is "three billion, eight hundred seventy-one million, nine hundred ninety-one thousand, six hundred sixty-two".