66017476804608 has 1360 divisors, whose sum is σ = 234375709646400. Its totient is φ = 18353529815040.

The previous prime is 66017476804583. The next prime is 66017476804681. The reversal of 66017476804608 is 80640867471066.

66017476804608 is a `hidden beast` number, since 6 + 6 + 0 + 17 + 4 + 7 + 6 + 8 + 0 + 4 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 174188592963 + ... + 174188593341.

Almost surely, 2^{66017476804608} 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 66017476804608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117187854823200).

66017476804608 is an abundant number, since it is smaller than the sum of its proper divisors (168358232841792).

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

66017476804608 is an frugal number, since it uses more digits than its factorization.

66017476804608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 66017476804608 in words is "sixty-six trillion, seventeen billion, four hundred seventy-six million, eight hundred four thousand, six hundred eight".