681676007 has 2 divisors, whose sum is σ = 681676008. Its totient is φ = 681676006.

The previous prime is 681675959. The next prime is 681676027. The reversal of 681676007 is 700676186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681676007 - 2¹⁴ = 681659623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681676027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340838003 + 340838004.

It is an arithmetic number, because the mean of its divisors is an integer number (340838004).

Almost surely, 2^681676007 is an apocalyptic number.

681676007 is a deficient number, since it is larger than the sum of its proper divisors (1).

681676007 is an equidigital number, since it uses as much as digits as its factorization.

681676007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 681676007 is about 26108.9258109176. The cubic root of 681676007 is about 880.0878041693.

The spelling of 681676007 in words is "six hundred eighty-one million, six hundred seventy-six thousand, seven".