66623511820824 has 96 divisors (see below), whose sum is σ = 206216766756000. Its totient is φ = 19035184329216.

The previous prime is 66623511820771. The next prime is 66623511820843. The reversal of 66623511820824 is 42802811532666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177376132 + ... + 177751340.

It is an arithmetic number, because the mean of its divisors is an integer number (2148091320375).

Almost surely, 2^{66623511820824} is an apocalyptic number.

It is an amenable number.

66623511820824 is an abundant number, since it is smaller than the sum of its proper divisors (139593254935176).

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

66623511820824 is a wasteful number, since it uses less digits than its factorization.

66623511820824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727537 (or 727530 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 66623511820824 in words is "sixty-six trillion, six hundred twenty-three billion, five hundred eleven million, eight hundred twenty thousand, eight hundred twenty-four".