866487078 has 32 divisors (see below), whose sum is σ = 1951912800. Its totient is φ = 284871168.

The previous prime is 866487047. The next prime is 866487101. The reversal of 866487078 is 870784668.

866487078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

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, 105963 + ... + 113846.

It is an arithmetic number, because the mean of its divisors is an integer number (60997275).

Almost surely, 2^866487078 is an apocalyptic number.

866487078 is an abundant number, since it is smaller than the sum of its proper divisors (1085425722).

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

866487078 is a wasteful number, since it uses less digits than its factorization.

866487078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219893 (or 219887 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The square root of 866487078 is about 29436.1525678884. The cubic root of 866487078 is about 953.3536423154.

The spelling of 866487078 in words is "eight hundred sixty-six million, four hundred eighty-seven thousand, seventy-eight".