6906666 has 16 divisors (see below), whose sum is σ = 14876064. Its totient is φ = 2125104.

The previous prime is 6906661. The next prime is 6906677. The reversal of 6906666 is 6666096.

It is a Harshad number since it is a multiple of its sum of digits (39).

6906666 is a modest number, since divided by 6666 gives 690 as remainder.

It is not an unprimeable number, because it can be changed into a prime (6906661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44196 + ... + 44351.

It is an arithmetic number, because the mean of its divisors is an integer number (929754).

Almost surely, 2^6906666 is an apocalyptic number.

6906666 is an abundant number, since it is smaller than the sum of its proper divisors (7969398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6906666 is a wasteful number, since it uses less digits than its factorization.

6906666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88565.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 6906666 is about 2628.0536524204. The cubic root of 6906666 is about 190.4391136425.

The spelling of 6906666 in words is "six million, nine hundred six thousand, six hundred sixty-six".