670647740 has 48 divisors (see below), whose sum is σ = 1615337472. Its totient is φ = 229110336.

The previous prime is 670647697. The next prime is 670647767. The reversal of 670647740 is 47746076.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31157 + ... + 48083.

It is an arithmetic number, because the mean of its divisors is an integer number (33652864).

Almost surely, 2^670647740 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 670647740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807668736).

670647740 is an abundant number, since it is smaller than the sum of its proper divisors (944689732).

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

670647740 is a wasteful number, since it uses less digits than its factorization.

670647740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17226 (or 17224 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 670647740 is about 25896.8673781212. The cubic root of 670647740 is about 875.3159087881.

The spelling of 670647740 in words is "six hundred seventy million, six hundred forty-seven thousand, seven hundred forty".