6660787 has 16 divisors (see below), whose sum is σ = 8128512. Its totient is φ = 5328000.

The previous prime is 6660781. The next prime is 6660791. The reversal of 6660787 is 7870666.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6660787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6660781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26412 + ... + 26662.

It is an arithmetic number, because the mean of its divisors is an integer number (508032).

Almost surely, 2^6660787 is an apocalyptic number.

6660787 is a deficient number, since it is larger than the sum of its proper divisors (1467725).

6660787 is a wasteful number, since it uses less digits than its factorization.

6660787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 6660787 is about 2580.8500537614. The cubic root of 6660787 is about 188.1518597205.

It can be divided in two parts, 6660 and 787, that added together give a palindrome (7447).

The spelling of 6660787 in words is "six million, six hundred sixty thousand, seven hundred eighty-seven".