8158661418 has 16 divisors (see below), whose sum is σ = 16369793856. Its totient is φ = 2710808640.

The previous prime is 8158661411. The next prime is 8158661419. The reversal of 8158661418 is 8141668518.

It is a super-2 number, since 2×8158661418² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8158661411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2184271 + ... + 2188002.

It is an arithmetic number, because the mean of its divisors is an integer number (1023112116).

Almost surely, 2^8158661418 is an apocalyptic number.

8158661418 is an abundant number, since it is smaller than the sum of its proper divisors (8211132438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8158661418 is a wasteful number, since it uses less digits than its factorization.

8158661418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372589.

The product of its digits is 368640, while the sum is 48.

The square root of 8158661418 is about 90325.3088453065. The cubic root of 8158661418 is about 2013.1353275577.

The spelling of 8158661418 in words is "eight billion, one hundred fifty-eight million, six hundred sixty-one thousand, four hundred eighteen".