866724458635141 has 4 divisors (see below), whose sum is σ = 867639690376992. Its totient is φ = 865809226893292.

The previous prime is 866724458635117. The next prime is 866724458635159. The reversal of 866724458635141 is 141536854427668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866724458635141 - 2¹¹ = 866724458633093 is a prime.

It is a super-2 number, since 2×866724458635141² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866724458635171) 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, 457615869505 + ... + 457615871398.

It is an arithmetic number, because the mean of its divisors is an integer number (216909922594248).

Almost surely, 2^{866724458635141} is an apocalyptic number.

866724458635141 is the 18619608-th centered pentagonal number and also the 15736441-st centered heptagonal number.

It is an amenable number.

866724458635141 is a deficient number, since it is larger than the sum of its proper divisors (915231741851).

866724458635141 is an equidigital number, since it uses as much as digits as its factorization.

866724458635141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915231741850.

The product of its digits is 928972800, while the sum is 70.

The spelling of 866724458635141 in words is "eight hundred sixty-six trillion, seven hundred twenty-four billion, four hundred fifty-eight million, six hundred thirty-five thousand, one hundred forty-one".