670778368 has 88 divisors (see below), whose sum is σ = 1480472280. Its totient is φ = 301793280.

The previous prime is 670778351. The next prime is 670778369. The reversal of 670778368 is 863877076.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41370624 + 629407744 = 6432^2 + 25088^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (670778369) 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 7 ways as a sum of consecutive naturals, for example, 545178 + ... + 546406.

Almost surely, 2^670778368 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 670778368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740236140).

670778368 is an abundant number, since it is smaller than the sum of its proper divisors (809693912).

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

670778368 is a wasteful number, since it uses less digits than its factorization.

670778368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 52.

The square root of 670778368 is about 25899.3893364303. The cubic root of 670778368 is about 875.3727361094.

The spelling of 670778368 in words is "six hundred seventy million, seven hundred seventy-eight thousand, three hundred sixty-eight".