667216260384 has 96 divisors (see below), whose sum is σ = 1782320682240. Its totient is φ = 218489455872.

The previous prime is 667216260311. The next prime is 667216260401. The reversal of 667216260384 is 483062612766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8587599 + ... + 8664945.

It is an arithmetic number, because the mean of its divisors is an integer number (18565840440).

Almost surely, 2^667216260384 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 667216260384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891160341120).

667216260384 is an abundant number, since it is smaller than the sum of its proper divisors (1115104421856).

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

667216260384 is a wasteful number, since it uses less digits than its factorization.

667216260384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78942 (or 78934 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 667216260384 in words is "six hundred sixty-seven billion, two hundred sixteen million, two hundred sixty thousand, three hundred eighty-four".