670165637 has 2 divisors, whose sum is σ = 670165638. Its totient is φ = 670165636.

The previous prime is 670165631. The next prime is 670165667. The reversal of 670165637 is 736561076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480442561 + 189723076 = 21919^2 + 13774^2 .

It is a cyclic number.

It is not a de Polignac number, because 670165637 - 2¹⁴ = 670149253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 670165594 and 670165603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670165631) 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, 335082818 + 335082819.

It is an arithmetic number, because the mean of its divisors is an integer number (335082819).

Almost surely, 2^670165637 is an apocalyptic number.

It is an amenable number.

670165637 is a deficient number, since it is larger than the sum of its proper divisors (1).

670165637 is an equidigital number, since it uses as much as digits as its factorization.

670165637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 670165637 is about 25887.5575711576. The cubic root of 670165637 is about 875.1061148040.

The spelling of 670165637 in words is "six hundred seventy million, one hundred sixty-five thousand, six hundred thirty-seven".