878800066 has 8 divisors (see below), whose sum is σ = 1320568380. Its totient is φ = 438610608.

The previous prime is 878800051. The next prime is 878800067. The reversal of 878800066 is 660008878.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 871961841 + 6838225 = 29529^2 + 2615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 878799995 and 878800031.

It is not an unprimeable number, because it can be changed into a prime (878800067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393321 + ... + 395548.

Almost surely, 2^878800066 is an apocalyptic number.

878800066 is a deficient number, since it is larger than the sum of its proper divisors (441768314).

878800066 is a wasteful number, since it uses less digits than its factorization.

878800066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789428.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 878800066 is about 29644.5621657666. The cubic root of 878800066 is about 957.8482136254.

The spelling of 878800066 in words is "eight hundred seventy-eight million, eight hundred thousand, sixty-six".