6661306 has 16 divisors (see below), whose sum is σ = 10497600. Its totient is φ = 3164128.

The previous prime is 6661301. The next prime is 6661307. The reversal of 6661306 is 6031666.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6661301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7830 + ... + 8638.

It is an arithmetic number, because the mean of its divisors is an integer number (656100).

Almost surely, 2^6661306 is an apocalyptic number.

6661306 is a deficient number, since it is larger than the sum of its proper divisors (3836294).

6661306 is a wasteful number, since it uses less digits than its factorization.

6661306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 6661306 is about 2580.9506000697. The cubic root of 6661306 is about 188.1567464443.

The spelling of 6661306 in words is "six million, six hundred sixty-one thousand, three hundred six".