212628666 has 8 divisors (see below), whose sum is σ = 425257344. Its totient is φ = 70876220.

The previous prime is 212628641. The next prime is 212628671. The reversal of 212628666 is 666826212.

It is a sphenic number, since it is the product of 3 distinct primes.

212628666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17719050 + ... + 17719061.

It is an arithmetic number, because the mean of its divisors is an integer number (53157168).

Almost surely, 2^212628666 is an apocalyptic number.

212628666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212628666 is a wasteful number, since it uses less digits than its factorization.

212628666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35438116.

The product of its digits is 82944, while the sum is 39.

The square root of 212628666 is about 14581.7922766716. The cubic root of 212628666 is about 596.8620114349.

The spelling of 212628666 in words is "two hundred twelve million, six hundred twenty-eight thousand, six hundred sixty-six".