66671120980 has 24 divisors (see below), whose sum is σ = 140321197800. Its totient is φ = 26609049600.

The previous prime is 66671120969. The next prime is 66671120981. The reversal of 66671120980 is 8902117666.

It can be written as a sum of positive squares in 4 ways, for example, as 30752532496 + 35918588484 = 175364^2 + 189522^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66671120980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66671120981) 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, 3703221 + ... + 3721180.

It is an arithmetic number, because the mean of its divisors is an integer number (5846716575).

Almost surely, 2^66671120980 is an apocalyptic number.

It is an amenable number.

66671120980 is an abundant number, since it is smaller than the sum of its proper divisors (73650076820).

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

66671120980 is a wasteful number, since it uses less digits than its factorization.

66671120980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7424859 (or 7424857 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 66671120980 in words is "sixty-six billion, six hundred seventy-one million, one hundred twenty thousand, nine hundred eighty".