8165566 has 4 divisors (see below), whose sum is σ = 12248352. Its totient is φ = 4082782.

The previous prime is 8165543. The next prime is 8165569. The reversal of 8165566 is 6655618.

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

It is a super-3 number, since 3×8165566³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8165569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2041390 + ... + 2041393.

It is an arithmetic number, because the mean of its divisors is an integer number (3062088).

Almost surely, 2^8165566 is an apocalyptic number.

8165566 is a deficient number, since it is larger than the sum of its proper divisors (4082786).

8165566 is a wasteful number, since it uses less digits than its factorization.

8165566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082785.

The product of its digits is 43200, while the sum is 37.

The square root of 8165566 is about 2857.5454502072. The cubic root of 8165566 is about 201.3703065245.

The spelling of 8165566 in words is "eight million, one hundred sixty-five thousand, five hundred sixty-six".