3871720366 has 4 divisors (see below), whose sum is σ = 5807580552. Its totient is φ = 1935860182.

The previous prime is 3871720351. The next prime is 3871720379. The reversal of 3871720366 is 6630271783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6630271783 = 139 ⋅47699797.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 967930090 + ... + 967930093.

It is an arithmetic number, because the mean of its divisors is an integer number (1451895138).

Almost surely, 2^3871720366 is an apocalyptic number.

3871720366 is a deficient number, since it is larger than the sum of its proper divisors (1935860186).

3871720366 is a wasteful number, since it uses less digits than its factorization.

3871720366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935860185.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 3871720366 is about 62223.1497595549. The cubic root of 3871720366 is about 1570.2470794552.

The spelling of 3871720366 in words is "three billion, eight hundred seventy-one million, seven hundred twenty thousand, three hundred sixty-six".