196668450691 has 8 divisors (see below), whose sum is σ = 207065710800. Its totient is φ = 186275819520.

The previous prime is 196668450637. The next prime is 196668450707. The reversal of 196668450691 is 196054866691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 196668450691 - 2¹⁷ = 196668319619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196668450611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1069846 + ... + 1240123.

It is an arithmetic number, because the mean of its divisors is an integer number (25883213850).

Almost surely, 2^196668450691 is an apocalyptic number.

196668450691 is a deficient number, since it is larger than the sum of its proper divisors (10397260109).

196668450691 is a wasteful number, since it uses less digits than its factorization.

196668450691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314469.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 196668450691 in words is "one hundred ninety-six billion, six hundred sixty-eight million, four hundred fifty thousand, six hundred ninety-one".