78666124093 has 2 divisors, whose sum is σ = 78666124094. Its totient is φ = 78666124092.

The previous prime is 78666124091. The next prime is 78666124151. The reversal of 78666124093 is 39042166687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76210227844 + 2455896249 = 276062^2 + 49557^2 .

It is a cyclic number.

It is not a de Polignac number, because 78666124093 - 2¹ = 78666124091 is a prime.

Together with 78666124091, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78666124093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78666124091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39333062046 + 39333062047.

It is an arithmetic number, because the mean of its divisors is an integer number (39333062047).

Almost surely, 2^78666124093 is an apocalyptic number.

It is an amenable number.

78666124093 is a deficient number, since it is larger than the sum of its proper divisors (1).

78666124093 is an equidigital number, since it uses as much as digits as its factorization.

78666124093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 78666124093 in words is "seventy-eight billion, six hundred sixty-six million, one hundred twenty-four thousand, ninety-three".