670544680 has 96 divisors (see below), whose sum is σ = 1644167160. Its totient is φ = 246005760.

The previous prime is 670544669. The next prime is 670544683. The reversal of 670544680 is 86445076.

It can be written as a sum of positive squares in 12 ways, for example, as 459684 + 670084996 = 678^2 + 25886^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (670544683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1899384 + ... + 1899736.

Almost surely, 2^670544680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670544680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (822083580).

670544680 is an abundant number, since it is smaller than the sum of its proper divisors (973622480).

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

670544680 is a wasteful number, since it uses less digits than its factorization.

670544680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 670544680 is about 25894.8774857113. The cubic root of 670544680 is about 875.2710692132.

The spelling of 670544680 in words is "six hundred seventy million, five hundred forty-four thousand, six hundred eighty".