8173661 has 4 divisors (see below), whose sum is σ = 8185632. Its totient is φ = 8161692.

The previous prime is 8173643. The next prime is 8173663. The reversal of 8173661 is 1663718.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8173661 - 2⁶ = 8173597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8173663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4895 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (2046408).

Almost surely, 2^8173661 is an apocalyptic number.

It is an amenable number.

8173661 is a deficient number, since it is larger than the sum of its proper divisors (11971).

8173661 is a wasteful number, since it uses less digits than its factorization.

8173661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11970.

The product of its digits is 6048, while the sum is 32.

The square root of 8173661 is about 2858.9615247499. The cubic root of 8173661 is about 201.4368279087.

The spelling of 8173661 in words is "eight million, one hundred seventy-three thousand, six hundred sixty-one".