78680011 has 2 divisors, whose sum is σ = 78680012. Its totient is φ = 78680010.

The previous prime is 78679973. The next prime is 78680039. The reversal of 78680011 is 11008687.

It is a strong prime.

It is an emirp because it is prime and its reverse (11008687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78680011 - 2⁷ = 78679883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78630011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39340005 + 39340006.

It is an arithmetic number, because the mean of its divisors is an integer number (39340006).

Almost surely, 2^78680011 is an apocalyptic number.

78680011 is a deficient number, since it is larger than the sum of its proper divisors (1).

78680011 is an equidigital number, since it uses as much as digits as its factorization.

78680011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 78680011 is about 8870.1753646701. The cubic root of 78680011 is about 428.5039246750.

Adding to 78680011 its reverse (11008687), we get a palindrome (89688698).

The spelling of 78680011 in words is "seventy-eight million, six hundred eighty thousand, eleven".