8071668 has 108 divisors (see below), whose sum is σ = 23963940. Its totient is φ = 2280960.

The previous prime is 8071663. The next prime is 8071669. The reversal of 8071668 is 8661708.

It can be written as a sum of positive squares in 2 ways, for example, as 5963364 + 2108304 = 2442^2 + 1452^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8071663) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 73998 + ... + 74106.

Almost surely, 2^8071668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8071668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11981970).

8071668 is an abundant number, since it is smaller than the sum of its proper divisors (15892272).

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

8071668 is a wasteful number, since it uses less digits than its factorization.

8071668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 8071668 is about 2841.0681090041. The cubic root of 8071668 is about 200.5954587185.

The spelling of 8071668 in words is "eight million, seventy-one thousand, six hundred sixty-eight".