66512011276680 has 128 divisors (see below), whose sum is σ = 204677882277120. Its totient is φ = 17280647659520.

The previous prime is 66512011276631. The next prime is 66512011276687. The reversal of 66512011276680 is 8667211021566.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66512011276687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5441817 + ... + 12752936.

It is an arithmetic number, because the mean of its divisors is an integer number (1599045955290).

Almost surely, 2^{66512011276680} is an apocalyptic number.

66512011276680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66512011276680 is an abundant number, since it is smaller than the sum of its proper divisors (138165871000440).

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

66512011276680 is a wasteful number, since it uses less digits than its factorization.

66512011276680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18195551 (or 18195547 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 66512011276680 in words is "sixty-six trillion, five hundred twelve billion, eleven million, two hundred seventy-six thousand, six hundred eighty".