6601687 has 4 divisors (see below), whose sum is σ = 6713640. Its totient is φ = 6489736.

The previous prime is 6601649. The next prime is 6601691. The reversal of 6601687 is 7861066.

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 6601687 - 2¹¹ = 6599639 is a prime.

It is a Duffinian number.

6601687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601787) 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, 55888 + ... + 56005.

It is an arithmetic number, because the mean of its divisors is an integer number (1678410).

Almost surely, 2^6601687 is an apocalyptic number.

6601687 is a deficient number, since it is larger than the sum of its proper divisors (111953).

6601687 is a wasteful number, since it uses less digits than its factorization.

6601687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111952.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 6601687 is about 2569.3748266845. The cubic root of 6601687 is about 187.5937261780.

The spelling of 6601687 in words is "six million, six hundred one thousand, six hundred eighty-seven".