66124443880 has 64 divisors (see below), whose sum is σ = 162342792000. Its totient is φ = 24039720960.

The previous prime is 66124443877. The next prime is 66124443919. The reversal of 66124443880 is 8834442166.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66124443880.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2228824 + ... + 2258296.

It is an arithmetic number, because the mean of its divisors is an integer number (2536606125).

Almost surely, 2^66124443880 is an apocalyptic number.

It is an amenable number.

66124443880 is an abundant number, since it is smaller than the sum of its proper divisors (96218348120).

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

66124443880 is a wasteful number, since it uses less digits than its factorization.

66124443880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34594 (or 34590 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 66124443880 in words is "sixty-six billion, one hundred twenty-four million, four hundred forty-three thousand, eight hundred eighty".