670647648 has 96 divisors (see below), whose sum is σ = 1932118272. Its totient is φ = 201996800.

The previous prime is 670647643. The next prime is 670647661. The reversal of 670647648 is 846746076.

It is a happy number.

670647648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 670647597 and 670647606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670647643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180853 + ... + 184523.

It is an arithmetic number, because the mean of its divisors is an integer number (20126232).

Almost surely, 2^670647648 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 670647648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (966059136).

670647648 is an abundant number, since it is smaller than the sum of its proper divisors (1261470624).

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

670647648 is a wasteful number, since it uses less digits than its factorization.

670647648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868 (or 3860 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 48.

The square root of 670647648 is about 25896.8656018446. The cubic root of 670647648 is about 875.3158687626.

The spelling of 670647648 in words is "six hundred seventy million, six hundred forty-seven thousand, six hundred forty-eight".