678005011 has 2 divisors, whose sum is σ = 678005012. Its totient is φ = 678005010.

The previous prime is 678004993. The next prime is 678005023. The reversal of 678005011 is 110500876.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678005011 - 2⁷ = 678004883 is a prime.

It is a super-2 number, since 2×678005011² = 919381589882220242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (678005051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339002505 + 339002506.

It is an arithmetic number, because the mean of its divisors is an integer number (339002506).

Almost surely, 2^678005011 is an apocalyptic number.

678005011 is a deficient number, since it is larger than the sum of its proper divisors (1).

678005011 is an equidigital number, since it uses as much as digits as its factorization.

678005011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 678005011 is about 26038.5293555531. The cubic root of 678005011 is about 878.5051286544.

Adding to 678005011 its reverse (110500876), we get a palindrome (788505887).

The spelling of 678005011 in words is "six hundred seventy-eight million, five thousand, eleven".