66230599680 has 720 divisors, whose sum is σ = 269649866304. Its totient is φ = 14722007040.

The previous prime is 66230599663. The next prime is 66230599691. The reversal of 66230599680 is 8699503266.

66230599680 is a `hidden beast` number, since 6 + 623 + 0 + 5 + 9 + 9 + 6 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a super-2 number, since 2×66230599680² (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, 211599204 + ... + 211599516.

Almost surely, 2^66230599680 is an apocalyptic number.

66230599680 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 66230599680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134824933152).

66230599680 is an abundant number, since it is smaller than the sum of its proper divisors (203419266624).

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

66230599680 is a wasteful number, since it uses less digits than its factorization.

66230599680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 66230599680 in words is "sixty-six billion, two hundred thirty million, five hundred ninety-nine thousand, six hundred eighty".