670556867 has 2 divisors, whose sum is σ = 670556868. Its totient is φ = 670556866.

The previous prime is 670556863. The next prime is 670556899. The reversal of 670556867 is 768655076.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670556867 - 2² = 670556863 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670556863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335278433 + 335278434.

It is an arithmetic number, because the mean of its divisors is an integer number (335278434).

Almost surely, 2^670556867 is an apocalyptic number.

670556867 is a deficient number, since it is larger than the sum of its proper divisors (1).

670556867 is an equidigital number, since it uses as much as digits as its factorization.

670556867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The square root of 670556867 is about 25895.1128014535. The cubic root of 670556867 is about 875.2763717999.

The spelling of 670556867 in words is "six hundred seventy million, five hundred fifty-six thousand, eight hundred sixty-seven".