1166554878 has 32 divisors (see below), whose sum is σ = 2392280352. Its totient is φ = 379008000.

The previous prime is 1166554853. The next prime is 1166554897. The reversal of 1166554878 is 8784556611.

1166554878 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1166554878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415078 + ... + 417878.

It is an arithmetic number, because the mean of its divisors is an integer number (74758761).

Almost surely, 2^1166554878 is an apocalyptic number.

1166554878 is an abundant number, since it is smaller than the sum of its proper divisors (1225725474).

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

1166554878 is a wasteful number, since it uses less digits than its factorization.

1166554878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540.

The product of its digits is 1612800, while the sum is 51.

The square root of 1166554878 is about 34154.8660954775. The cubic root of 1166554878 is about 1052.6929748489.

The spelling of 1166554878 in words is "one billion, one hundred sixty-six million, five hundred fifty-four thousand, eight hundred seventy-eight".