668601677352070 has 128 divisors (see below), whose sum is σ = 1576836154156032. Its totient is φ = 198047602368000.

The previous prime is 668601677352067. The next prime is 668601677352083. The reversal of 668601677352070 is 70253776106866.

It is a junction number, because it is equal to n+sod(n) for n = 668601677351993 and 668601677352011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 271657981 + ... + 274108120.

It is an arithmetic number, because the mean of its divisors is an integer number (12319032454344).

Almost surely, 2^{668601677352070} is an apocalyptic number.

668601677352070 is an abundant number, since it is smaller than the sum of its proper divisors (908234476803962).

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

668601677352070 is a wasteful number, since it uses less digits than its factorization.

668601677352070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545766206.

The product of its (nonzero) digits is 106686720, while the sum is 64.

The spelling of 668601677352070 in words is "six hundred sixty-eight trillion, six hundred one billion, six hundred seventy-seven million, three hundred fifty-two thousand, seventy".