196666680 has 128 divisors (see below), whose sum is σ = 677652480. Its totient is φ = 44728320.

The previous prime is 196666637. The next prime is 196666681. The reversal of 196666680 is 86666691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196666681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215425 + ... + 216335.

It is an arithmetic number, because the mean of its divisors is an integer number (5294160).

Almost surely, 2^196666680 is an apocalyptic number.

196666680 is a gapful number since it is divisible by the number (10) 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 196666680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338826240).

196666680 is an abundant number, since it is smaller than the sum of its proper divisors (480985800).

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

196666680 is a wasteful number, since it uses less digits than its factorization.

196666680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1185 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 196666680 is about 14023.7897873578. The cubic root of 196666680 is about 581.5364336895.

The spelling of 196666680 in words is "one hundred ninety-six million, six hundred sixty-six thousand, six hundred eighty".