670777739 has 2 divisors, whose sum is σ = 670777740. Its totient is φ = 670777738.

The previous prime is 670777733. The next prime is 670777759. The reversal of 670777739 is 937777076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670777739 - 2¹² = 670773643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670777733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335388869 + 335388870.

It is an arithmetic number, because the mean of its divisors is an integer number (335388870).

Almost surely, 2^670777739 is an apocalyptic number.

670777739 is a deficient number, since it is larger than the sum of its proper divisors (1).

670777739 is an equidigital number, since it uses as much as digits as its factorization.

670777739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2722734, while the sum is 53.

The square root of 670777739 is about 25899.3771932840. The cubic root of 670777739 is about 875.3724624921.

The spelling of 670777739 in words is "six hundred seventy million, seven hundred seventy-seven thousand, seven hundred thirty-nine".