3866145687 has 64 divisors (see below), whose sum is σ = 6094848000. Its totient is φ = 2418530400.

The previous prime is 3866145653. The next prime is 3866145697. The reversal of 3866145687 is 7865416683.

3866145687 is a `hidden beast` number, since 3 + 8 + 66 + 14 + 568 + 7 = 666.

It is not a de Polignac number, because 3866145687 - 2⁶ = 3866145623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866145637) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3900762 + ... + 3901752.

It is an arithmetic number, because the mean of its divisors is an integer number (95232000).

Almost surely, 2^3866145687 is an apocalyptic number.

3866145687 is a deficient number, since it is larger than the sum of its proper divisors (2228702313).

3866145687 is a wasteful number, since it uses less digits than its factorization.

3866145687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1163 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 3866145687 is about 62178.3377632436. The cubic root of 3866145687 is about 1569.4930797477.

It can be divided in two parts, 38661 and 45687, that added together give a palindrome (84348).

The spelling of 3866145687 in words is "three billion, eight hundred sixty-six million, one hundred forty-five thousand, six hundred eighty-seven".