670752778 has 8 divisors (see below), whose sum is σ = 1006239168. Its totient is φ = 335339724.

The previous prime is 670752773. The next prime is 670752787. The reversal of 670752778 is 877257076.

670752778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×670752778³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (670752773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25375 + ... + 44557.

It is an arithmetic number, because the mean of its divisors is an integer number (125779896).

Almost surely, 2^670752778 is an apocalyptic number.

670752778 is a deficient number, since it is larger than the sum of its proper divisors (335486390).

670752778 is a wasteful number, since it uses less digits than its factorization.

670752778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36668.

The product of its (nonzero) digits is 1152480, while the sum is 49.

The square root of 670752778 is about 25898.8953046264. The cubic root of 670752778 is about 875.3616042292.

The spelling of 670752778 in words is "six hundred seventy million, seven hundred fifty-two thousand, seven hundred seventy-eight".