866511506751473 has 12 divisors (see below), whose sum is σ = 952447247804304. Its totient is φ = 787737141569400.

The previous prime is 866511506751439. The next prime is 866511506751521. The reversal of 866511506751473 is 374157605115668.

It is not a de Polignac number, because 866511506751473 - 2³⁶ = 866442787274737 is a prime.

It is a super-2 number, since 2×866511506751473² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866511506751673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290704490 + ... + 293670092.

It is an arithmetic number, because the mean of its divisors is an integer number (79370603983692).

Almost surely, 2^{866511506751473} is an apocalyptic number.

It is an amenable number.

866511506751473 is a deficient number, since it is larger than the sum of its proper divisors (85935741052831).

866511506751473 is a wasteful number, since it uses less digits than its factorization.

866511506751473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380396 (or 5380385 counting only the distinct ones).

The product of its (nonzero) digits is 127008000, while the sum is 65.

The spelling of 866511506751473 in words is "eight hundred sixty-six trillion, five hundred eleven billion, five hundred six million, seven hundred fifty-one thousand, four hundred seventy-three".