670263647 has 2 divisors, whose sum is σ = 670263648. Its totient is φ = 670263646.

The previous prime is 670263637. The next prime is 670263691. The reversal of 670263647 is 746362076.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670263647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670263637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335131823 + 335131824.

It is an arithmetic number, because the mean of its divisors is an integer number (335131824).

Almost surely, 2^670263647 is an apocalyptic number.

670263647 is a deficient number, since it is larger than the sum of its proper divisors (1).

670263647 is an equidigital number, since it uses as much as digits as its factorization.

670263647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 41.

The square root of 670263647 is about 25889.4504962929. The cubic root of 670263647 is about 875.1487733970.

The spelling of 670263647 in words is "six hundred seventy million, two hundred sixty-three thousand, six hundred forty-seven".