210102066 has 32 divisors (see below), whose sum is σ = 481958400. Its totient is φ = 67774320.

The previous prime is 210102059. The next prime is 210102089. The reversal of 210102066 is 660201012.

It is a happy number.

210102066 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 61081 + ... + 64428.

It is an arithmetic number, because the mean of its divisors is an integer number (15061200).

Almost surely, 2^210102066 is an apocalyptic number.

210102066 is an abundant number, since it is smaller than the sum of its proper divisors (271856334).

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

210102066 is a wasteful number, since it uses less digits than its factorization.

210102066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125551 (or 125545 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 210102066 is about 14494.8979299614. The cubic root of 210102066 is about 594.4884768760.

Adding to 210102066 its reverse (660201012), we get a palindrome (870303078).

The spelling of 210102066 in words is "two hundred ten million, one hundred two thousand, sixty-six".