6665747 has 4 divisors (see below), whose sum is σ = 7271736. Its totient is φ = 6059760.

The previous prime is 6665741. The next prime is 6665773. The reversal of 6665747 is 7475666.

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

It is a cyclic number.

It is not a de Polignac number, because 6665747 - 2¹⁶ = 6600211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6665741) 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, 302978 + ... + 302999.

It is an arithmetic number, because the mean of its divisors is an integer number (1817934).

Almost surely, 2^6665747 is an apocalyptic number.

6665747 is a deficient number, since it is larger than the sum of its proper divisors (605989).

6665747 is a wasteful number, since it uses less digits than its factorization.

6665747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605988.

The product of its digits is 211680, while the sum is 41.

The square root of 6665747 is about 2581.8107986450. The cubic root of 6665747 is about 188.1985509835.

The spelling of 6665747 in words is "six million, six hundred sixty-five thousand, seven hundred forty-seven".