667701225344 has 64 divisors (see below), whose sum is σ = 1349876772000. Its totient is φ = 328918597632.

The previous prime is 667701225337. The next prime is 667701225349. The reversal of 667701225344 is 443522107766.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667701225349) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8642117 + ... + 8719035.

Almost surely, 2^667701225344 is an apocalyptic number.

667701225344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667701225344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674938386000).

667701225344 is an abundant number, since it is smaller than the sum of its proper divisors (682175546656).

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

667701225344 is an equidigital number, since it uses as much as digits as its factorization.

667701225344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77935 (or 77923 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 667701225344 in words is "six hundred sixty-seven billion, seven hundred one million, two hundred twenty-five thousand, three hundred forty-four".