6749239985 has 16 divisors (see below), whose sum is σ = 8156408832. Its totient is φ = 5361283200.

The previous prime is 6749239979. The next prime is 6749239993. The reversal of 6749239985 is 5899329476.

It is a happy number.

It is not a de Polignac number, because 6749239985 - 2⁸ = 6749239729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539117 + ... + 551493.

It is an arithmetic number, because the mean of its divisors is an integer number (509775552).

Almost surely, 2^6749239985 is an apocalyptic number.

It is an amenable number.

6749239985 is a deficient number, since it is larger than the sum of its proper divisors (1407168847).

6749239985 is a wasteful number, since it uses less digits than its factorization.

6749239985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13144.

The product of its digits is 29393280, while the sum is 62.

The square root of 6749239985 is about 82153.7581915764. The cubic root of 6749239985 is about 1889.8106418914.

The spelling of 6749239985 in words is "six billion, seven hundred forty-nine million, two hundred thirty-nine thousand, nine hundred eighty-five".