8166261 has 4 divisors (see below), whose sum is σ = 10888352. Its totient is φ = 5444172.

The previous prime is 8166229. The next prime is 8166269. The reversal of 8166261 is 1626618.

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 not a de Polignac number, because 8166261 - 2⁵ = 8166229 is a prime.

It is an Ulam number.

It is a Duffinian number.

8166261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166269) 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, 1361041 + ... + 1361046.

It is an arithmetic number, because the mean of its divisors is an integer number (2722088).

Almost surely, 2^8166261 is an apocalyptic number.

It is an amenable number.

8166261 is a deficient number, since it is larger than the sum of its proper divisors (2722091).

8166261 is a wasteful number, since it uses less digits than its factorization.

8166261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722090.

The product of its digits is 3456, while the sum is 30.

The square root of 8166261 is about 2857.6670554842. The cubic root of 8166261 is about 201.3760194737.

The spelling of 8166261 in words is "eight million, one hundred sixty-six thousand, two hundred sixty-one".