66660000624 has 240 divisors, whose sum is σ = 223311198240. Its totient is φ = 18982978560.

The previous prime is 66660000613. The next prime is 66660000697. The reversal of 66660000624 is 42600006666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6620554 + ... + 6630614.

It is an arithmetic number, because the mean of its divisors is an integer number (930463326).

Almost surely, 2^66660000624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66660000624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111655599120).

66660000624 is an abundant number, since it is smaller than the sum of its proper divisors (156651197616).

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

66660000624 is a wasteful number, since it uses less digits than its factorization.

66660000624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10405 (or 10386 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 66660000624 in words is "sixty-six billion, six hundred sixty million, six hundred twenty-four", and thus it is an aban number.