212066646 has 16 divisors (see below), whose sum is σ = 462691008. Its totient is φ = 64262600.

The previous prime is 212066639. The next prime is 212066671. The reversal of 212066646 is 646660212.

212066646 is digitally balanced in base 2, because in such base 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 (33).

It is a congruent number.

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, 1606500 + ... + 1606631.

It is an arithmetic number, because the mean of its divisors is an integer number (28918188).

Almost surely, 2^212066646 is an apocalyptic number.

212066646 is an abundant number, since it is smaller than the sum of its proper divisors (250624362).

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

212066646 is a wasteful number, since it uses less digits than its factorization.

212066646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213147.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 212066646 is about 14562.5082317573. The cubic root of 212066646 is about 596.3356722836.

The spelling of 212066646 in words is "two hundred twelve million, sixty-six thousand, six hundred forty-six".