670755920 has 20 divisors (see below), whose sum is σ = 1559507700. Its totient is φ = 268302336.

The previous prime is 670755919. The next prime is 670755937. The reversal of 670755920 is 29557076.

It can be written as a sum of positive squares in 2 ways, for example, as 316412944 + 354342976 = 17788^2 + 18824^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4192145 + ... + 4192304.

It is an arithmetic number, because the mean of its divisors is an integer number (77975385).

Almost surely, 2^670755920 is an apocalyptic number.

It is an amenable number.

670755920 is an abundant number, since it is smaller than the sum of its proper divisors (888751780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670755920 is a wasteful number, since it uses less digits than its factorization.

670755920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8384462 (or 8384456 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 670755920 is about 25898.9559635133. The cubic root of 670755920 is about 875.3629710427.

The spelling of 670755920 in words is "six hundred seventy million, seven hundred fifty-five thousand, nine hundred twenty".