670078656 has 280 divisors, whose sum is σ = 2187523184. Its totient is φ = 201553920.

The previous prime is 670078639. The next prime is 670078663. The reversal of 670078656 is 656870076.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4110831 + ... + 4110993.

Almost surely, 2^670078656 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 670078656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093761592).

670078656 is an abundant number, since it is smaller than the sum of its proper divisors (1517444528).

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

670078656 is a wasteful number, since it uses less digits than its factorization.

670078656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 670078656 is about 25885.8775396933. The cubic root of 670078656 is about 875.0682530704.

The spelling of 670078656 in words is "six hundred seventy million, seventy-eight thousand, six hundred fifty-six".