78066047 has 2 divisors, whose sum is σ = 78066048. Its totient is φ = 78066046.

The previous prime is 78066007. The next prime is 78066061. The reversal of 78066047 is 74066087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78066047 - 2¹⁰ = 78065023 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78066047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78066007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39033023 + 39033024.

It is an arithmetic number, because the mean of its divisors is an integer number (39033024).

Almost surely, 2^78066047 is an apocalyptic number.

78066047 is a deficient number, since it is larger than the sum of its proper divisors (1).

78066047 is an equidigital number, since it uses as much as digits as its factorization.

78066047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 78066047 is about 8835.4992501839. The cubic root of 78066047 is about 427.3864308514.

The spelling of 78066047 in words is "seventy-eight million, sixty-six thousand, forty-seven".