678767633 has 2 divisors, whose sum is σ = 678767634. Its totient is φ = 678767632.

The previous prime is 678767611. The next prime is 678767689. The reversal of 678767633 is 336767876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 658589569 + 20178064 = 25663^2 + 4492^2 .

It is a cyclic number.

It is not a de Polignac number, because 678767633 - 2¹⁰ = 678766609 is a prime.

It is not a weakly prime, because it can be changed into another prime (678767603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339383816 + 339383817.

It is an arithmetic number, because the mean of its divisors is an integer number (339383817).

Almost surely, 2^678767633 is an apocalyptic number.

It is an amenable number.

678767633 is a deficient number, since it is larger than the sum of its proper divisors (1).

678767633 is an equidigital number, since it uses as much as digits as its factorization.

678767633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 53.

The square root of 678767633 is about 26053.1693465498. The cubic root of 678767633 is about 878.8343869394.

The spelling of 678767633 in words is "six hundred seventy-eight million, seven hundred sixty-seven thousand, six hundred thirty-three".