866063806 has 16 divisors (see below), whose sum is σ = 1317448800. Its totient is φ = 426942208.

The previous prime is 866063791. The next prime is 866063813. The reversal of 866063806 is 608360668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57126 + ... + 70678.

It is an arithmetic number, because the mean of its divisors is an integer number (82340550).

Almost surely, 2^866063806 is an apocalyptic number.

866063806 is a deficient number, since it is larger than the sum of its proper divisors (451384994).

866063806 is a wasteful number, since it uses less digits than its factorization.

866063806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14003.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 866063806 is about 29428.9620272275. The cubic root of 866063806 is about 953.1983818245.

The spelling of 866063806 in words is "eight hundred sixty-six million, sixty-three thousand, eight hundred six".