78660443 has 2 divisors, whose sum is σ = 78660444. Its totient is φ = 78660442.

The previous prime is 78660419. The next prime is 78660451. The reversal of 78660443 is 34406687.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78660443 - 2¹⁰ = 78659419 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 78660397 and 78660406.

It is not a weakly prime, because it can be changed into another prime (78660473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39330221 + 39330222.

It is an arithmetic number, because the mean of its divisors is an integer number (39330222).

Almost surely, 2^78660443 is an apocalyptic number.

78660443 is a deficient number, since it is larger than the sum of its proper divisors (1).

78660443 is an equidigital number, since it uses as much as digits as its factorization.

78660443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 78660443 is about 8869.0722739191. The cubic root of 78660443 is about 428.4683982437.

The spelling of 78660443 in words is "seventy-eight million, six hundred sixty thousand, four hundred forty-three".