66356196480 has 384 divisors, whose sum is σ = 267966990720. Its totient is φ = 14814019584.

The previous prime is 66356196479. The next prime is 66356196493. The reversal of 66356196480 is 8469165366.

66356196480 is a `hidden beast` number, since 66 + 356 + 196 + 48 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×66356196480² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1714624 + ... + 1752896.

It is an arithmetic number, because the mean of its divisors is an integer number (697830705).

Almost surely, 2^66356196480 is an apocalyptic number.

66356196480 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 66356196480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133983495360).

66356196480 is an abundant number, since it is smaller than the sum of its proper divisors (201610794240).

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

66356196480 is a wasteful number, since it uses less digits than its factorization.

66356196480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38348 (or 38333 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 66356196480 in words is "sixty-six billion, three hundred fifty-six million, one hundred ninety-six thousand, four hundred eighty".