670317766778 has 32 divisors (see below), whose sum is σ = 1154672064000. Its totient is φ = 288639151920.

The previous prime is 670317766751. The next prime is 670317766801. The reversal of 670317766778 is 877667713076.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15954563 + ... + 15996521.

It is an arithmetic number, because the mean of its divisors is an integer number (36083502000).

Almost surely, 2^670317766778 is an apocalyptic number.

670317766778 is a deficient number, since it is larger than the sum of its proper divisors (484354297222).

670317766778 is a wasteful number, since it uses less digits than its factorization.

670317766778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80210.

The product of its (nonzero) digits is 87127488, while the sum is 65.

The spelling of 670317766778 in words is "six hundred seventy billion, three hundred seventeen million, seven hundred sixty-six thousand, seven hundred seventy-eight".