6661067 has 4 divisors (see below), whose sum is σ = 7612656. Its totient is φ = 5709480.

The previous prime is 6661049. The next prime is 6661069. The reversal of 6661067 is 7601666.

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

It is not a de Polignac number, because 6661067 - 2¹⁸ = 6398923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6661069) 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, 475784 + ... + 475797.

It is an arithmetic number, because the mean of its divisors is an integer number (1903164).

Almost surely, 2^6661067 is an apocalyptic number.

6661067 is a deficient number, since it is larger than the sum of its proper divisors (951589).

6661067 is an equidigital number, since it uses as much as digits as its factorization.

6661067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951588.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 6661067 is about 2580.9042988844. The cubic root of 6661067 is about 188.1544961348.

The spelling of 6661067 in words is "six million, six hundred sixty-one thousand, sixty-seven".