866134555 has 32 divisors (see below), whose sum is σ = 1224937728. Its totient is φ = 579619200.

The previous prime is 866134543. The next prime is 866134559. The reversal of 866134555 is 555431668.

It is not a de Polignac number, because 866134555 - 2⁹ = 866134043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866134559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246360 + ... + 249850.

It is an arithmetic number, because the mean of its divisors is an integer number (38279304).

Almost surely, 2^866134555 is an apocalyptic number.

866134555 is a deficient number, since it is larger than the sum of its proper divisors (358803173).

866134555 is a wasteful number, since it uses less digits than its factorization.

866134555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867.

The product of its digits is 432000, while the sum is 43.

The square root of 866134555 is about 29430.1640328422. The cubic root of 866134555 is about 953.2243368005.

The spelling of 866134555 in words is "eight hundred sixty-six million, one hundred thirty-four thousand, five hundred fifty-five".