656100666001 has 16 divisors (see below), whose sum is σ = 720124771968. Its totient is φ = 592807248000.

The previous prime is 656100665963. The next prime is 656100666007. The reversal of 656100666001 is 100666001656.

It is not a de Polignac number, because 656100666001 - 2¹³ = 656100657809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656100666007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18170101 + ... + 18206173.

It is an arithmetic number, because the mean of its divisors is an integer number (45007798248).

Almost surely, 2^656100666001 is an apocalyptic number.

It is an amenable number.

656100666001 is a deficient number, since it is larger than the sum of its proper divisors (64024105967).

656100666001 is a wasteful number, since it uses less digits than its factorization.

656100666001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46152.

The product of its (nonzero) digits is 38880, while the sum is 37.

Adding to 656100666001 its reverse (100666001656), we get a palindrome (756766667657).

The spelling of 656100666001 in words is "six hundred fifty-six billion, one hundred million, six hundred sixty-six thousand, one".