678770737 has 2 divisors, whose sum is σ = 678770738. Its totient is φ = 678770736.

The previous prime is 678770731. The next prime is 678770767. The reversal of 678770737 is 737077876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677612961 + 1157776 = 26031^2 + 1076^2 .

It is a cyclic number.

It is not a de Polignac number, because 678770737 - 2¹⁹ = 678246449 is a prime.

It is not a weakly prime, because it can be changed into another prime (678770731) 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, 339385368 + 339385369.

It is an arithmetic number, because the mean of its divisors is an integer number (339385369).

Almost surely, 2^678770737 is an apocalyptic number.

It is an amenable number.

678770737 is a deficient number, since it is larger than the sum of its proper divisors (1).

678770737 is an equidigital number, since it uses as much as digits as its factorization.

678770737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2420208, while the sum is 52.

The square root of 678770737 is about 26053.2289169692. The cubic root of 678770737 is about 878.8357265720.

The spelling of 678770737 in words is "six hundred seventy-eight million, seven hundred seventy thousand, seven hundred thirty-seven".