666801400101 has 8 divisors (see below), whose sum is σ = 902338213344. Its totient is φ = 437899426800.

The previous prime is 666801400087. The next prime is 666801400229. The reversal of 666801400101 is 101004108666.

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

It is not a de Polignac number, because 666801400101 - 2⁷ = 666801399973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666801400301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1658709750 + ... + 1658710151.

It is an arithmetic number, because the mean of its divisors is an integer number (112792276668).

Almost surely, 2^666801400101 is an apocalyptic number.

It is an amenable number.

666801400101 is a deficient number, since it is larger than the sum of its proper divisors (235536813243).

666801400101 is a wasteful number, since it uses less digits than its factorization.

666801400101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317419971.

The product of its (nonzero) digits is 6912, while the sum is 33.

Adding to 666801400101 its reverse (101004108666), we get a palindrome (767805508767).

The spelling of 666801400101 in words is "six hundred sixty-six billion, eight hundred one million, four hundred thousand, one hundred one".