66477753888 has 384 divisors, whose sum is σ = 227607367680. Its totient is φ = 16497561600.

The previous prime is 66477753851. The next prime is 66477753913. The reversal of 66477753888 is 88835777466.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26058213 + ... + 26060763.

It is an arithmetic number, because the mean of its divisors is an integer number (592727520).

Almost surely, 2^66477753888 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 66477753888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113803683840).

66477753888 is an abundant number, since it is smaller than the sum of its proper divisors (161129613792).

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

66477753888 is a wasteful number, since it uses less digits than its factorization.

66477753888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760 (or 2752 counting only the distinct ones).

The product of its digits is 379330560, while the sum is 69.

The spelling of 66477753888 in words is "sixty-six billion, four hundred seventy-seven million, seven hundred fifty-three thousand, eight hundred eighty-eight".