6685702987 has 2 divisors, whose sum is σ = 6685702988. Its totient is φ = 6685702986.

The previous prime is 6685702939. The next prime is 6685702993. The reversal of 6685702987 is 7892075866.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6685702987 is a prime.

It is not a weakly prime, because it can be changed into another prime (6685706987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3342851493 + 3342851494.

It is an arithmetic number, because the mean of its divisors is an integer number (3342851494).

Almost surely, 2^6685702987 is an apocalyptic number.

6685702987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6685702987 is an equidigital number, since it uses as much as digits as its factorization.

6685702987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The square root of 6685702987 is about 81766.1481727004. The cubic root of 6685702987 is about 1883.8617417207.

The spelling of 6685702987 in words is "six billion, six hundred eighty-five million, seven hundred two thousand, nine hundred eighty-seven".