212666700964 has 27 divisors (see below), whose sum is σ = 385491074241.
Its totient is φ = 102653770800.
The previous prime is 212666700949. The next prime is 212666701081. The reversal of 212666700964 is 469007666212.
The square root of 212666700964 is 461158.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in only one way, i.e., 111517259364 + 101149441600 = 333942^2 + 318040^2
It is a super-2 number, since 2×2126667009642 (a number of 23 digits) contains 22 as substring.
It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 26743189 + ... + 26751139.
Almost surely, 2212666700964 is an apocalyptic number.
212666700964 is the 461158-th square number.
It is an amenable number.
212666700964 is a deficient number, since it is larger than the sum of its proper divisors (172824373277).
212666700964 is an frugal number, since it uses more digits than its factorization.
212666700964 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15964 (or 7982 counting only the distinct ones).
The product of its (nonzero) digits is 1306368, while the sum is 49.
Multiplying 212666700964 by its sum of digits (49), we get a square (10420668347236 = 32281062).
The spelling of 212666700964 in words is "two hundred twelve billion, six hundred sixty-six million, seven hundred thousand, nine hundred sixty-four".