210512066 has 4 divisors (see below), whose sum is σ = 315768102. Its totient is φ = 105256032.

The previous prime is 210512021. The next prime is 210512087. The reversal of 210512066 is 660215012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 146047225 + 64464841 = 12085^2 + 8029^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52628015 + ... + 52628018.

Almost surely, 2^210512066 is an apocalyptic number.

210512066 is a deficient number, since it is larger than the sum of its proper divisors (105256036).

210512066 is a wasteful number, since it uses less digits than its factorization.

210512066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105256035.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 210512066 is about 14509.0339444086. The cubic root of 210512066 is about 594.8749269861.

Adding to 210512066 its reverse (660215012), we get a palindrome (870727078).

The spelling of 210512066 in words is "two hundred ten million, five hundred twelve thousand, sixty-six".