670557607 has 2 divisors, whose sum is σ = 670557608. Its totient is φ = 670557606.

The previous prime is 670557593. The next prime is 670557619. The reversal of 670557607 is 706755076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670557607 - 2²³ = 662168999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670557647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335278803 + 335278804.

It is an arithmetic number, because the mean of its divisors is an integer number (335278804).

Almost surely, 2^670557607 is an apocalyptic number.

670557607 is a deficient number, since it is larger than the sum of its proper divisors (1).

670557607 is an equidigital number, since it uses as much as digits as its factorization.

670557607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 308700, while the sum is 43.

The square root of 670557607 is about 25895.1270898600. The cubic root of 670557607 is about 875.2766937732.

The spelling of 670557607 in words is "six hundred seventy million, five hundred fifty-seven thousand, six hundred seven".