67416709 has 2 divisors, whose sum is σ = 67416710. Its totient is φ = 67416708.

The previous prime is 67416653. The next prime is 67416737. The reversal of 67416709 is 90761476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58476609 + 8940100 = 7647^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 67416709 - 2²⁵ = 33862277 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67816709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33708354 + 33708355.

It is an arithmetic number, because the mean of its divisors is an integer number (33708355).

Almost surely, 2^67416709 is an apocalyptic number.

It is an amenable number.

67416709 is a deficient number, since it is larger than the sum of its proper divisors (1).

67416709 is an equidigital number, since it uses as much as digits as its factorization.

67416709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 67416709 is about 8210.7678690851. The cubic root of 67416709 is about 406.9951020344.

The spelling of 67416709 in words is "sixty-seven million, four hundred sixteen thousand, seven hundred nine".