866438553546141 has 16 divisors (see below), whose sum is σ = 1166790786958080. Its totient is φ = 571883951643200.

The previous prime is 866438553546101. The next prime is 866438553546169. The reversal of 866438553546141 is 141645355834668.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 866438553546141 - 2⁴¹ = 864239530290589 is a prime.

It is a super-2 number, since 2×866438553546141² (a number of 31 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866438553546101) 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, 3492425010 + ... + 3492673091.

It is an arithmetic number, because the mean of its divisors is an integer number (72924424184880).

Almost surely, 2^{866438553546141} is an apocalyptic number.

It is an amenable number.

866438553546141 is a deficient number, since it is larger than the sum of its proper divisors (300352233411939).

866438553546141 is a wasteful number, since it uses less digits than its factorization.

866438553546141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985098516.

The product of its digits is 995328000, while the sum is 69.

The spelling of 866438553546141 in words is "eight hundred sixty-six trillion, four hundred thirty-eight billion, five hundred fifty-three million, five hundred forty-six thousand, one hundred forty-one".