678061 has 2 divisors, whose sum is σ = 678062. Its totient is φ = 678060.

The previous prime is 678047. The next prime is 678077. The reversal of 678061 is 160876.

678061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532900 + 145161 = 730^2 + 381^2 .

It is a cyclic number.

It is not a de Polignac number, because 678061 - 2¹³ = 669869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339030 + 339031.

It is an arithmetic number, because the mean of its divisors is an integer number (339031).

2⁶⁷⁸⁰⁶¹ is an apocalyptic number.

It is an amenable number.

678061 is a deficient number, since it is larger than the sum of its proper divisors (1).

678061 is an equidigital number, since it uses as much as digits as its factorization.

678061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 678061 is about 823.4445943717. Note that the first 3 decimals coincide. The cubic root of 678061 is about 87.8529310024.

It can be divided in two parts, 67 and 8061, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 678061 in words is "six hundred seventy-eight thousand, sixty-one".