670220345 has 32 divisors (see below), whose sum is σ = 892442880. Its totient is φ = 480902400.

The previous prime is 670220321. The next prime is 670220347. The reversal of 670220345 is 543022076.

670220345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-670220345 is a prime.

It is not an unprimeable number, because it can be changed into a prime (670220347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219167 + ... + 222203.

It is an arithmetic number, because the mean of its divisors is an integer number (27888840).

Almost surely, 2^670220345 is an apocalyptic number.

It is an amenable number.

670220345 is a deficient number, since it is larger than the sum of its proper divisors (222222535).

670220345 is a wasteful number, since it uses less digits than its factorization.

670220345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 670220345 is about 25888.6141962060. The cubic root of 670220345 is about 875.1299268289.

The spelling of 670220345 in words is "six hundred seventy million, two hundred twenty thousand, three hundred forty-five".