66724361477320 has 32 divisors (see below), whose sum is σ = 150130191052800. Its totient is φ = 26689677439168.

The previous prime is 66724361477303. The next prime is 66724361477351. The reversal of 66724361477320 is 2377416342766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15905337 + ... + 19657783.

It is an arithmetic number, because the mean of its divisors is an integer number (4691568470400).

Almost surely, 2^{66724361477320} is an apocalyptic number.

It is an amenable number.

66724361477320 is an abundant number, since it is smaller than the sum of its proper divisors (83405829575480).

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

66724361477320 is a wasteful number, since it uses less digits than its factorization.

66724361477320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196997 (or 4196993 counting only the distinct ones).

The product of its (nonzero) digits is 42674688, while the sum is 58.

The spelling of 66724361477320 in words is "sixty-six trillion, seven hundred twenty-four billion, three hundred sixty-one million, four hundred seventy-seven thousand, three hundred twenty".