6707644987 has 4 divisors (see below), whose sum is σ = 6938943120. Its totient is φ = 6476346856.

The previous prime is 6707644969. The next prime is 6707644991. The reversal of 6707644987 is 7894467076.

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 6707644987 - 2¹⁹ = 6707120699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6707644787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115649023 + ... + 115649080.

It is an arithmetic number, because the mean of its divisors is an integer number (1734735780).

Almost surely, 2^6707644987 is an apocalyptic number.

6707644987 is a deficient number, since it is larger than the sum of its proper divisors (231298133).

6707644987 is a wasteful number, since it uses less digits than its factorization.

6707644987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231298132.

The product of its (nonzero) digits is 14224896, while the sum is 58.

The square root of 6707644987 is about 81900.2135955701. The cubic root of 6707644987 is about 1885.9203911711.

The spelling of 6707644987 in words is "six billion, seven hundred seven million, six hundred forty-four thousand, nine hundred eighty-seven".