3871666428578 has 32 divisors (see below), whose sum is σ = 6835743290880. Its totient is φ = 1627557914880.

The previous prime is 3871666428577. The next prime is 3871666428599. The reversal of 3871666428578 is 8758246661783.

It is not an unprimeable number, because it can be changed into a prime (3871666428577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141267368 + ... + 141294771.

It is an arithmetic number, because the mean of its divisors is an integer number (213616977840).

Almost surely, 2^{3871666428578} is an apocalyptic number.

3871666428578 is a deficient number, since it is larger than the sum of its proper divisors (2964076862302).

3871666428578 is a wasteful number, since it uses less digits than its factorization.

3871666428578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282562202.

The product of its digits is 650280960, while the sum is 71.

The spelling of 3871666428578 in words is "three trillion, eight hundred seventy-one billion, six hundred sixty-six million, four hundred twenty-eight thousand, five hundred seventy-eight".