670706263 has 2 divisors, whose sum is σ = 670706264. Its totient is φ = 670706262.

The previous prime is 670706207. The next prime is 670706269. The reversal of 670706263 is 362607076.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670706263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670706269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335353131 + 335353132.

It is an arithmetic number, because the mean of its divisors is an integer number (335353132).

Almost surely, 2^670706263 is an apocalyptic number.

670706263 is a deficient number, since it is larger than the sum of its proper divisors (1).

670706263 is an equidigital number, since it uses as much as digits as its factorization.

670706263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 670706263 is about 25897.9972777819. The cubic root of 670706263 is about 875.3413690608.

The spelling of 670706263 in words is "six hundred seventy million, seven hundred six thousand, two hundred sixty-three".