210061666602 has 32 divisors (see below), whose sum is σ = 472712620800. Its totient is φ = 69134217984.

The previous prime is 210061666589. The next prime is 210061666637. The reversal of 210061666602 is 206666160012.

It is a happy number.

It is an unprimeable number.

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, 24616183 + ... + 24624714.

It is an arithmetic number, because the mean of its divisors is an integer number (14772269400).

Almost surely, 2^210061666602 is an apocalyptic number.

210061666602 is an abundant number, since it is smaller than the sum of its proper divisors (262650954198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210061666602 is a wasteful number, since it uses less digits than its factorization.

210061666602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49240987 (or 49240981 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 210061666602 in words is "two hundred ten billion, sixty-one million, six hundred sixty-six thousand, six hundred two".