210006656669 has 8 divisors (see below), whose sum is σ = 220533164160. Its totient is φ = 199596464496.

The previous prime is 210006656653. The next prime is 210006656683. The reversal of 210006656669 is 966656600012.

It is a happy number.

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

It is not a de Polignac number, because 210006656669 - 2⁴ = 210006656653 is a prime.

It is a super-2 number, since 2×210006656669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210006356669) 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, 29075129 + ... + 29082350.

It is an arithmetic number, because the mean of its divisors is an integer number (27566645520).

Almost surely, 2^210006656669 is an apocalyptic number.

It is an amenable number.

210006656669 is a deficient number, since it is larger than the sum of its proper divisors (10526507491).

210006656669 is a wasteful number, since it uses less digits than its factorization.

210006656669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58157659.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 210006656669 in words is "two hundred ten billion, six million, six hundred fifty-six thousand, six hundred sixty-nine".