216662000401 has 128 divisors (see below), whose sum is σ = 307954483200. Its totient is φ = 147131458560.

The previous prime is 216662000339. The next prime is 216662000413. The reversal of 216662000401 is 104000266612.

216662000401 is a nontrivial binomial coefficient, being equal to C(658274, 2).

It is not a de Polignac number, because 216662000401 - 2⁹ = 216661999889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216662000401.

It is not an unprimeable number, because it can be changed into a prime (216662000201) 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 127 ways as a sum of consecutive naturals, for example, 212621670 + ... + 212622688.

It is an arithmetic number, because the mean of its divisors is an integer number (2405894400).

Almost surely, 2^216662000401 is an apocalyptic number.

216662000401 is the 658273-rd triangular number and also the 329137-th hexagonal number.

216662000401 is the 219425-th centered nonagonal number.

It is an amenable number.

216662000401 is a deficient number, since it is larger than the sum of its proper divisors (91292482799).

216662000401 is a wasteful number, since it uses less digits than its factorization.

216662000401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 216662000401 in words is "two hundred sixteen billion, six hundred sixty-two million, four hundred one", and thus it is an aban number.