78166063 has 2 divisors, whose sum is σ = 78166064. Its totient is φ = 78166062.

The previous prime is 78166031. The next prime is 78166069. The reversal of 78166063 is 36066187.

It is a strong prime.

It is an emirp because it is prime and its reverse (36066187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78166063 - 2⁵ = 78166031 is a prime.

It is a super-2 number, since 2×78166063² = 12219866809839938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78166069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39083031 + 39083032.

It is an arithmetic number, because the mean of its divisors is an integer number (39083032).

Almost surely, 2^78166063 is an apocalyptic number.

78166063 is a deficient number, since it is larger than the sum of its proper divisors (1).

78166063 is an equidigital number, since it uses as much as digits as its factorization.

78166063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 78166063 is about 8841.1573337431. The cubic root of 78166063 is about 427.5688714092.

The spelling of 78166063 in words is "seventy-eight million, one hundred sixty-six thousand, sixty-three".