670723663 has 2 divisors, whose sum is σ = 670723664. Its totient is φ = 670723662.

The previous prime is 670723637. The next prime is 670723673. The reversal of 670723663 is 366327076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670723663 - 2²⁹ = 133852751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670723673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335361831 + 335361832.

It is an arithmetic number, because the mean of its divisors is an integer number (335361832).

Almost surely, 2^670723663 is an apocalyptic number.

670723663 is a deficient number, since it is larger than the sum of its proper divisors (1).

670723663 is an equidigital number, since it uses as much as digits as its factorization.

670723663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 670723663 is about 25898.3332089152. Note that the first 3 decimals coincide. The cubic root of 670723663 is about 875.3489385980.

The spelling of 670723663 in words is "six hundred seventy million, seven hundred twenty-three thousand, six hundred sixty-three".