866802020 has 24 divisors (see below), whose sum is σ = 2080325184. Its totient is φ = 297189216.

The previous prime is 866801963. The next prime is 866802023. The reversal of 866802020 is 20208668.

It is a happy number.

866802020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (866802023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3095582 + ... + 3095861.

It is an arithmetic number, because the mean of its divisors is an integer number (86680216).

Almost surely, 2^866802020 is an apocalyptic number.

It is an amenable number.

866802020 is an abundant number, since it is smaller than the sum of its proper divisors (1213523164).

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

866802020 is a wasteful number, since it uses less digits than its factorization.

866802020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6191459 (or 6191457 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 866802020 is about 29441.5016600716. The cubic root of 866802020 is about 953.4691334521.

The spelling of 866802020 in words is "eight hundred sixty-six million, eight hundred two thousand, twenty".