6660767 has 4 divisors (see below), whose sum is σ = 6694776. Its totient is φ = 6626760.

The previous prime is 6660763. The next prime is 6660781. The reversal of 6660767 is 7670666.

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 6660767 - 2² = 6660763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6660767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660763) 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, 16709 + ... + 17102.

It is an arithmetic number, because the mean of its divisors is an integer number (1673694).

Almost surely, 2^6660767 is an apocalyptic number.

6660767 is a deficient number, since it is larger than the sum of its proper divisors (34009).

6660767 is a wasteful number, since it uses less digits than its factorization.

6660767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34008.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 6660767 is about 2580.8461790661. The cubic root of 6660767 is about 188.1516714024.

The spelling of 6660767 in words is "six million, six hundred sixty thousand, seven hundred sixty-seven".