670218520 has 16 divisors (see below), whose sum is σ = 1507991760. Its totient is φ = 268087392.

The previous prime is 670218517. The next prime is 670218533. The reversal of 670218520 is 25812076.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8377692 + ... + 8377771.

It is an arithmetic number, because the mean of its divisors is an integer number (94249485).

Almost surely, 2^670218520 is an apocalyptic number.

It is an amenable number.

670218520 is an abundant number, since it is smaller than the sum of its proper divisors (837773240).

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

670218520 is a wasteful number, since it uses less digits than its factorization.

670218520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16755474 (or 16755470 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 670218520 is about 25888.5789490269. The cubic root of 670218520 is about 875.1291325063.

The spelling of 670218520 in words is "six hundred seventy million, two hundred eighteen thousand, five hundred twenty".