6668399801 has 8 divisors (see below), whose sum is σ = 7866868224. Its totient is φ = 5531391360.

The previous prime is 6668399791. The next prime is 6668399807. The reversal of 6668399801 is 1089938666.

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 6668399801 - 2¹⁴ = 6668383417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6668399807) 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, 15364760 + ... + 15365193.

It is an arithmetic number, because the mean of its divisors is an integer number (983358528).

Almost surely, 2^6668399801 is an apocalyptic number.

It is an amenable number.

6668399801 is a deficient number, since it is larger than the sum of its proper divisors (1198468423).

6668399801 is a wasteful number, since it uses less digits than its factorization.

6668399801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30729991.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 6668399801 is about 81660.2706400120. The cubic root of 6668399801 is about 1882.2351378159.

The spelling of 6668399801 in words is "six billion, six hundred sixty-eight million, three hundred ninety-nine thousand, eight hundred one".