866880004 has 6 divisors (see below), whose sum is σ = 1517040014. Its totient is φ = 433440000.

The previous prime is 866879989. The next prime is 866880011. The reversal of 866880004 is 400088668.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 659462400 + 207417604 = 25680^2 + 14402^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 108359997 + ... + 108360004.

Almost surely, 2^866880004 is an apocalyptic number.

It is an amenable number.

866880004 is a deficient number, since it is larger than the sum of its proper divisors (650160010).

866880004 is a wasteful number, since it uses less digits than its factorization.

866880004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216720005 (or 216720003 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 866880004 is about 29442.8260192530. The cubic root of 866880004 is about 953.4977263355.

The spelling of 866880004 in words is "eight hundred sixty-six million, eight hundred eighty thousand, four".