210006656668 has 48 divisors (see below), whose sum is σ = 374483317824. Its totient is φ = 103027507200.

The previous prime is 210006656653. The next prime is 210006656683. The reversal of 210006656668 is 866656600012.

It is an interprime number because it is at equal distance from previous prime (210006656653) and next prime (210006656683).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82321993 + ... + 82324543.

It is an arithmetic number, because the mean of its divisors is an integer number (7801735788).

Almost surely, 2^210006656668 is an apocalyptic number.

It is an amenable number.

210006656668 is a deficient number, since it is larger than the sum of its proper divisors (164476661156).

210006656668 is a wasteful number, since it uses less digits than its factorization.

210006656668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982 (or 3980 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 210006656668 in words is "two hundred ten billion, six million, six hundred fifty-six thousand, six hundred sixty-eight".