866540313744073 has 32 divisors (see below), whose sum is σ = 905064808108032. Its totient is φ = 828709571712000.

The previous prime is 866540313744067. The next prime is 866540313744089. The reversal of 866540313744073 is 370447313045668.

It is a cyclic number.

It is not a de Polignac number, because 866540313744073 - 2⁵ = 866540313744041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866540313744013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3498264561 + ... + 3498512257.

It is an arithmetic number, because the mean of its divisors is an integer number (28283275253376).

Almost surely, 2^{866540313744073} is an apocalyptic number.

It is an amenable number.

866540313744073 is a deficient number, since it is larger than the sum of its proper divisors (38524494363959).

866540313744073 is a wasteful number, since it uses less digits than its factorization.

866540313744073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249945.

The product of its (nonzero) digits is 121927680, while the sum is 61.

The spelling of 866540313744073 in words is "eight hundred sixty-six trillion, five hundred forty billion, three hundred thirteen million, seven hundred forty-four thousand, seventy-three".