8066661 has 4 divisors (see below), whose sum is σ = 10755552. Its totient is φ = 5377772.

The previous prime is 8066593. The next prime is 8066677. The reversal of 8066661 is 1666608.

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 8066661 - 2⁷ = 8066533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8066161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344441 + ... + 1344446.

It is an arithmetic number, because the mean of its divisors is an integer number (2688888).

Almost surely, 2^8066661 is an apocalyptic number.

It is an amenable number.

8066661 is a deficient number, since it is larger than the sum of its proper divisors (2688891).

8066661 is a wasteful number, since it uses less digits than its factorization.

8066661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688890.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 8066661 is about 2840.1867896320. The cubic root of 8066661 is about 200.5539724890.

The spelling of 8066661 in words is "eight million, sixty-six thousand, six hundred sixty-one".