66353925980160 has 3360 divisors, whose sum is σ = 313081223317632. Its totient is φ = 13045963161600.

The previous prime is 66353925980137. The next prime is 66353925980183. The reversal of 66353925980160 is 6108952935366.

66353925980160 is a `hidden beast` number, since 6 + 6 + 3 + 5 + 39 + 2 + 598 + 0 + 1 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (66353925980137) and next prime (66353925980183).

It is a tau number, because it is divible by the number of its divisors (3360).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 656969564110 + ... + 656969564210.

Almost surely, 2^{66353925980160} is an apocalyptic number.

66353925980160 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 66353925980160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156540611658816).

66353925980160 is an abundant number, since it is smaller than the sum of its proper divisors (246727297337472).

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

66353925980160 is an equidigital number, since it uses as much as digits as its factorization.

66353925980160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 63.

The spelling of 66353925980160 in words is "sixty-six trillion, three hundred fifty-three billion, nine hundred twenty-five million, nine hundred eighty thousand, one hundred sixty".