670945705 has 8 divisors (see below), whose sum is σ = 817152192. Its totient is φ = 528745008.

The previous prime is 670945703. The next prime is 670945757. The reversal of 670945705 is 507549076.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 670945705 - 2¹ = 670945703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670945703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001077 + ... + 1001746.

It is an arithmetic number, because the mean of its divisors is an integer number (102144024).

Almost surely, 2^670945705 is an apocalyptic number.

It is an amenable number.

670945705 is a deficient number, since it is larger than the sum of its proper divisors (146206487).

670945705 is a wasteful number, since it uses less digits than its factorization.

670945705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002895.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 670945705 is about 25902.6196551623. The cubic root of 670945705 is about 875.4455222314.

The spelling of 670945705 in words is "six hundred seventy million, nine hundred forty-five thousand, seven hundred five".