61686707 has 2 divisors, whose sum is σ = 61686708. Its totient is φ = 61686706.

The previous prime is 61686661. The next prime is 61686731. The reversal of 61686707 is 70768616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61686707 - 2⁶ = 61686643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61686767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30843353 + 30843354.

It is an arithmetic number, because the mean of its divisors is an integer number (30843354).

Almost surely, 2^61686707 is an apocalyptic number.

61686707 is a deficient number, since it is larger than the sum of its proper divisors (1).

61686707 is an equidigital number, since it uses as much as digits as its factorization.

61686707 is an odious number, because the sum of its binary digits is odd.

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

The square root of 61686707 is about 7854.0885531040. The cubic root of 61686707 is about 395.1213791374.

The spelling of 61686707 in words is "sixty-one million, six hundred eighty-six thousand, seven hundred seven".