866223738705854 has 32 divisors (see below), whose sum is σ = 1313873487648000. Its totient is φ = 428276916518400.

The previous prime is 866223738705851. The next prime is 866223738705863. The reversal of 866223738705854 is 458507837322668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866223738705851) 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, 2545023974 + ... + 2545364310.

It is an arithmetic number, because the mean of its divisors is an integer number (41058546489000).

Almost surely, 2^{866223738705854} is an apocalyptic number.

866223738705854 is a deficient number, since it is larger than the sum of its proper divisors (447649748942146).

866223738705854 is a wasteful number, since it uses less digits than its factorization.

866223738705854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356468.

The product of its (nonzero) digits is 3251404800, while the sum is 74.

The spelling of 866223738705854 in words is "eight hundred sixty-six trillion, two hundred twenty-three billion, seven hundred thirty-eight million, seven hundred five thousand, eight hundred fifty-four".