66459992196 has 192 divisors, whose sum is σ = 177036984320. Its totient is φ = 19263329280.

The previous prime is 66459992177. The next prime is 66459992293. The reversal of 66459992196 is 69129995466.

It is a happy number.

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, 27888021 + ... + 27890403.

Almost surely, 2^66459992196 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 66459992196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88518492160).

66459992196 is an abundant number, since it is smaller than the sum of its proper divisors (110576992124).

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

66459992196 is a wasteful number, since it uses less digits than its factorization.

66459992196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586 (or 2584 counting only the distinct ones).

The product of its digits is 56687040, while the sum is 66.

The spelling of 66459992196 in words is "sixty-six billion, four hundred fifty-nine million, nine hundred ninety-two thousand, one hundred ninety-six".