842161668 has 24 divisors (see below), whose sum is σ = 1977103968. Its totient is φ = 278997696.

The previous prime is 842161667. The next prime is 842161673. The reversal of 842161668 is 866161248.

It is not an unprimeable number, because it can be changed into a prime (842161667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213321 + ... + 217232.

It is an arithmetic number, because the mean of its divisors is an integer number (82379332).

Almost surely, 2^842161668 is an apocalyptic number.

It is an amenable number.

842161668 is an abundant number, since it is smaller than the sum of its proper divisors (1134942300).

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

842161668 is a wasteful number, since it uses less digits than its factorization.

842161668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430723 (or 430721 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 842161668 is about 29020.0218469938. The cubic root of 842161668 is about 944.3474748433.

The spelling of 842161668 in words is "eight hundred forty-two million, one hundred sixty-one thousand, six hundred sixty-eight".