670663493 has 2 divisors, whose sum is σ = 670663494. Its totient is φ = 670663492.

The previous prime is 670663439. The next prime is 670663531. The reversal of 670663493 is 394366076.

Together with previous prime (670663439) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623850529 + 46812964 = 24977^2 + 6842^2 .

It is a cyclic number.

It is not a de Polignac number, because 670663493 - 2⁶ = 670663429 is a prime.

It is a super-2 number, since 2×670663493² = 899579041685922098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670663403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335331746 + 335331747.

It is an arithmetic number, because the mean of its divisors is an integer number (335331747).

Almost surely, 2^670663493 is an apocalyptic number.

It is an amenable number.

670663493 is a deficient number, since it is larger than the sum of its proper divisors (1).

670663493 is an equidigital number, since it uses as much as digits as its factorization.

670663493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 44.

The square root of 670663493 is about 25897.1715250913. The cubic root of 670663493 is about 875.3227622338.

The spelling of 670663493 in words is "six hundred seventy million, six hundred sixty-three thousand, four hundred ninety-three".