866127088155045 has 16 divisors (see below), whose sum is σ = 1386806819242752. Its totient is φ = 461599954284480.

The previous prime is 866127088154963. The next prime is 866127088155047. The reversal of 866127088155045 is 540551880721668.

It is not a de Polignac number, because 866127088155045 - 2¹⁴ = 866127088138661 is a prime.

It is a super-2 number, since 2×866127088155045² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866127088155047) 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, 20905774317 + ... + 20905815746.

It is an arithmetic number, because the mean of its divisors is an integer number (86675426202672).

Almost surely, 2^{866127088155045} is an apocalyptic number.

It is an amenable number.

866127088155045 is a deficient number, since it is larger than the sum of its proper divisors (520679731087707).

866127088155045 is a wasteful number, since it uses less digits than its factorization.

866127088155045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41811591452.

The product of its (nonzero) digits is 129024000, while the sum is 66.

The spelling of 866127088155045 in words is "eight hundred sixty-six trillion, one hundred twenty-seven billion, eighty-eight million, one hundred fifty-five thousand, forty-five".