878168212555667 has 24 divisors (see below), whose sum is σ = 1021500042362352. Its totient is φ = 748520036812800.

The previous prime is 878168212555663. The next prime is 878168212555717. The reversal of 878168212555667 is 766555212861878.

It is not a de Polignac number, because 878168212555667 - 2² = 878168212555663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878168212555663) 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, 1139539334 + ... + 1140309707.

It is an arithmetic number, because the mean of its divisors is an integer number (42562501765098).

Almost surely, 2^{878168212555667} is an apocalyptic number.

878168212555667 is a deficient number, since it is larger than the sum of its proper divisors (143331829806685).

878168212555667 is a wasteful number, since it uses less digits than its factorization.

878168212555667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279849187 (or 2279849168 counting only the distinct ones).

The product of its digits is 2709504000, while the sum is 77.

The spelling of 878168212555667 in words is "eight hundred seventy-eight trillion, one hundred sixty-eight billion, two hundred twelve million, five hundred fifty-five thousand, six hundred sixty-seven".