866763361868406 has 32 divisors (see below), whose sum is σ = 1749467725209600. Its totient is φ = 286264399428000.

The previous prime is 866763361868381. The next prime is 866763361868407. The reversal of 866763361868406 is 604868163367668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866763361868407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16877835 + ... + 44926473.

It is an arithmetic number, because the mean of its divisors is an integer number (54670866412800).

Almost surely, 2^{866763361868406} is an apocalyptic number.

866763361868406 is an abundant number, since it is smaller than the sum of its proper divisors (882704363341194).

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

866763361868406 is a wasteful number, since it uses less digits than its factorization.

866763361868406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28096004.

The product of its (nonzero) digits is 6019743744, while the sum is 78.

The spelling of 866763361868406 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, three hundred sixty-one million, eight hundred sixty-eight thousand, four hundred six".