866045275973 has 4 divisors (see below), whose sum is σ = 868367113548. Its totient is φ = 863723438400.

The previous prime is 866045275967. The next prime is 866045276053. The reversal of 866045275973 is 379572540668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 465448688644 + 400596587329 = 682238^2 + 632927^2 .

It is a cyclic number.

It is not a de Polignac number, because 866045275973 - 2¹⁰ = 866045274949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866045275943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160918228 + ... + 1160918973.

It is an arithmetic number, because the mean of its divisors is an integer number (217091778387).

Almost surely, 2^866045275973 is an apocalyptic number.

It is an amenable number.

866045275973 is a deficient number, since it is larger than the sum of its proper divisors (2321837575).

866045275973 is a wasteful number, since it uses less digits than its factorization.

866045275973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321837574.

The product of its (nonzero) digits is 76204800, while the sum is 62.

The spelling of 866045275973 in words is "eight hundred sixty-six billion, forty-five million, two hundred seventy-five thousand, nine hundred seventy-three".