667216076544 has 108 divisors (see below), whose sum is σ = 1925041755000. Its totient is φ = 222255839232.

The previous prime is 667216076543. The next prime is 667216076587. The reversal of 667216076544 is 445670612766.

667216076544 is a `hidden beast` number, since 6 + 6 + 7 + 21 + 6 + 0 + 76 + 544 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667216076543) 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 11 ways as a sum of consecutive naturals, for example, 3357102 + ... + 3550290.

Almost surely, 2^667216076544 is an apocalyptic number.

667216076544 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 667216076544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962520877500).

667216076544 is an abundant number, since it is smaller than the sum of its proper divisors (1257825678456).

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

667216076544 is a wasteful number, since it uses less digits than its factorization.

667216076544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194710 (or 194693 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 667216076544 in words is "six hundred sixty-seven billion, two hundred sixteen million, seventy-six thousand, five hundred forty-four".