6749239959 has 72 divisors (see below), whose sum is σ = 12407541120. Its totient is φ = 3495895200.

The previous prime is 6749239951. The next prime is 6749239961. The reversal of 6749239959 is 9599329476.

6749239959 is a `hidden beast` number, since 6 + 7 + 492 + 3 + 99 + 59 = 666.

It is not a de Polignac number, because 6749239959 - 2³ = 6749239951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 6749239896 and 6749239905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6749239951) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1836694 + ... + 1840364.

It is an arithmetic number, because the mean of its divisors is an integer number (172326960).

Almost surely, 2^6749239959 is an apocalyptic number.

6749239959 is a deficient number, since it is larger than the sum of its proper divisors (5658301161).

6749239959 is a wasteful number, since it uses less digits than its factorization.

6749239959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081 (or 4071 counting only the distinct ones).

The product of its digits is 33067440, while the sum is 63.

The square root of 6749239959 is about 82153.7580333365. The cubic root of 6749239959 is about 1889.8106394647.

The spelling of 6749239959 in words is "six billion, seven hundred forty-nine million, two hundred thirty-nine thousand, nine hundred fifty-nine".