6687352739 has 2 divisors, whose sum is σ = 6687352740. Its totient is φ = 6687352738.

The previous prime is 6687352729. The next prime is 6687352753. The reversal of 6687352739 is 9372537866.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6687352739 - 2⁴ = 6687352723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6687352709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3343676369 + 3343676370.

It is an arithmetic number, because the mean of its divisors is an integer number (3343676370).

Almost surely, 2^6687352739 is an apocalyptic number.

6687352739 is a deficient number, since it is larger than the sum of its proper divisors (1).

6687352739 is an equidigital number, since it uses as much as digits as its factorization.

6687352739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 56.

The square root of 6687352739 is about 81776.2357839978. The cubic root of 6687352739 is about 1884.0166817513.

The spelling of 6687352739 in words is "six billion, six hundred eighty-seven million, three hundred fifty-two thousand, seven hundred thirty-nine".