3864728862666 has 48 divisors (see below), whose sum is σ = 9627109075584. Its totient is φ = 1097596215072.

The previous prime is 3864728862661. The next prime is 3864728862667. The reversal of 3864728862666 is 6662688274683.

It is a super-2 number, since 2×3864728862666² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3864728862594 and 3864728862603.

It is not an unprimeable number, because it can be changed into a prime (3864728862661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91812645 + ... + 91854728.

It is an arithmetic number, because the mean of its divisors is an integer number (200564772408).

Almost surely, 2^{3864728862666} is an apocalyptic number.

3864728862666 is an abundant number, since it is smaller than the sum of its proper divisors (5762380212918).

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

3864728862666 is a wasteful number, since it uses less digits than its factorization.

3864728862666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183667555 (or 183667552 counting only the distinct ones).

The product of its digits is 1337720832, while the sum is 72.

The spelling of 3864728862666 in words is "three trillion, eight hundred sixty-four billion, seven hundred twenty-eight million, eight hundred sixty-two thousand, six hundred sixty-six".