3987166711 has 18 divisors (see below), whose sum is σ = 4528354208. Its totient is φ = 3504369000.

The previous prime is 3987166681. The next prime is 3987166741. The reversal of 3987166711 is 1176617893.

It is an interprime number because it is at equal distance from previous prime (3987166681) and next prime (3987166741).

It is not a de Polignac number, because 3987166711 - 2¹⁹ = 3986642423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987166741) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3866766 + ... + 3867796.

Almost surely, 2^3987166711 is an apocalyptic number.

3987166711 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3987166711 is a deficient number, since it is larger than the sum of its proper divisors (541187497).

3987166711 is an equidigital number, since it uses as much as digits as its factorization.

3987166711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115 (or 1073 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The square root of 3987166711 is about 63144.0156388553. The cubic root of 3987166711 is about 1585.7016018375.

The spelling of 3987166711 in words is "three billion, nine hundred eighty-seven million, one hundred sixty-six thousand, seven hundred eleven".