4122878666 has 16 divisors (see below), whose sum is σ = 6719804160. Its totient is φ = 1889943840.

The previous prime is 4122878651. The next prime is 4122878687. The reversal of 4122878666 is 6668782214.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1748771 + ... + 1751126.

It is an arithmetic number, because the mean of its divisors is an integer number (419987760).

Almost surely, 2^4122878666 is an apocalyptic number.

4122878666 is a deficient number, since it is larger than the sum of its proper divisors (2596925494).

4122878666 is a wasteful number, since it uses less digits than its factorization.

4122878666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499949.

The product of its digits is 1548288, while the sum is 50.

The square root of 4122878666 is about 64209.6462067811. The cubic root of 4122878666 is about 1603.4921985997.

The spelling of 4122878666 in words is "four billion, one hundred twenty-two million, eight hundred seventy-eight thousand, six hundred sixty-six".