212066690 has 16 divisors (see below), whose sum is σ = 416422080. Its totient is φ = 77115120.

The previous prime is 212066677. The next prime is 212066707. The reversal of 212066690 is 96660212.

212066690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212066690² = 89944562015112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963830 + ... + 964049.

It is an arithmetic number, because the mean of its divisors is an integer number (26026380).

Almost surely, 2^212066690 is an apocalyptic number.

212066690 is a deficient number, since it is larger than the sum of its proper divisors (204355390).

212066690 is a wasteful number, since it uses less digits than its factorization.

212066690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927897.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 212066690 is about 14562.5097424860. The cubic root of 212066690 is about 596.3357135266.

The spelling of 212066690 in words is "two hundred twelve million, sixty-six thousand, six hundred ninety".