8161606 has 4 divisors (see below), whose sum is σ = 12242412. Its totient is φ = 4080802.

The previous prime is 8161591. The next prime is 8161607. The reversal of 8161606 is 6061618.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×8161606² = 133223624998472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2040400 + ... + 2040403.

It is an arithmetic number, because the mean of its divisors is an integer number (3060603).

Almost surely, 2^8161606 is an apocalyptic number.

8161606 is a deficient number, since it is larger than the sum of its proper divisors (4080806).

8161606 is a wasteful number, since it uses less digits than its factorization.

8161606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080805.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 8161606 is about 2856.8524638140. The cubic root of 8161606 is about 201.3377488567.

The spelling of 8161606 in words is "eight million, one hundred sixty-one thousand, six hundred six".