668960957364 has 72 divisors (see below), whose sum is σ = 1817168457888. Its totient is φ = 190982514240.

The previous prime is 668960957359. The next prime is 668960957369. The reversal of 668960957364 is 463759069866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (668960957359) and next prime (668960957369).

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668960957369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311034 + ... + 1197774.

It is an arithmetic number, because the mean of its divisors is an integer number (25238450804).

Almost surely, 2^668960957364 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 668960957364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908584228944).

668960957364 is an abundant number, since it is smaller than the sum of its proper divisors (1148207500524).

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

668960957364 is a wasteful number, since it uses less digits than its factorization.

668960957364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888045 (or 888036 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 69.

The spelling of 668960957364 in words is "six hundred sixty-eight billion, nine hundred sixty million, nine hundred fifty-seven thousand, three hundred sixty-four".