66602745600 has 216 divisors, whose sum is σ = 227384248560. Its totient is φ = 17148149760.

The previous prime is 66602745541. The next prime is 66602745611. The reversal of 66602745600 is 654720666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 496992 + ... + 616608.

Almost surely, 2^66602745600 is an apocalyptic number.

66602745600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66602745600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113692124280).

66602745600 is an abundant number, since it is smaller than the sum of its proper divisors (160781502960).

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

66602745600 is a wasteful number, since it uses less digits than its factorization.

66602745600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119675 (or 119656 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 66602745600 in words is "sixty-six billion, six hundred two million, seven hundred forty-five thousand, six hundred".