670736640 has 144 divisors (see below), whose sum is σ = 2448286848. Its totient is φ = 153305088.

The previous prime is 670736617. The next prime is 670736641. The reversal of 670736640 is 46637076.

It is not an unprimeable number, because it can be changed into a prime (670736641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14404 + ... + 39356.

It is an arithmetic number, because the mean of its divisors is an integer number (17001992).

Almost surely, 2^670736640 is an apocalyptic number.

670736640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670736640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224143424).

670736640 is an abundant number, since it is smaller than the sum of its proper divisors (1777550208).

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

670736640 is a wasteful number, since it uses less digits than its factorization.

670736640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24984 (or 24970 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 670736640 is about 25898.5837450622. The cubic root of 670736640 is about 875.3545839085.

The spelling of 670736640 in words is "six hundred seventy million, seven hundred thirty-six thousand, six hundred forty".