8166722 has 4 divisors (see below), whose sum is σ = 12250086. Its totient is φ = 4083360.

The previous prime is 8166659. The next prime is 8166727. The reversal of 8166722 is 2276618.

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

It can be written as a sum of positive squares in only one way, i.e., 7946761 + 219961 = 2819^2 + 469^2 .

It is not an unprimeable number, because it can be changed into a prime (8166727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2041679 + ... + 2041682.

Almost surely, 2^8166722 is an apocalyptic number.

8166722 is a deficient number, since it is larger than the sum of its proper divisors (4083364).

8166722 is a wasteful number, since it uses less digits than its factorization.

8166722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4083363.

The product of its digits is 8064, while the sum is 32.

The square root of 8166722 is about 2857.7477145472. The cubic root of 8166722 is about 201.3798087476.

It can be divided in two parts, 8166 and 722, that added together give a palindrome (8888).

The spelling of 8166722 in words is "eight million, one hundred sixty-six thousand, seven hundred twenty-two".