66077742480 has 640 divisors, whose sum is σ = 231451852800. Its totient is φ = 15527116800.

The previous prime is 66077742469. The next prime is 66077742503. The reversal of 66077742480 is 8424777066.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 681213792 + ... + 681213888.

It is an arithmetic number, because the mean of its divisors is an integer number (361643520).

Almost surely, 2^66077742480 is an apocalyptic number.

66077742480 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 66077742480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115725926400).

66077742480 is an abundant number, since it is smaller than the sum of its proper divisors (165374110320).

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

66077742480 is a wasteful number, since it uses less digits than its factorization.

66077742480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 51.

The spelling of 66077742480 in words is "sixty-six billion, seventy-seven million, seven hundred forty-two thousand, four hundred eighty".