212661662 has 8 divisors (see below), whose sum is σ = 319059000. Its totient is φ = 106308664.

The previous prime is 212661637. The next prime is 212661671. The reversal of 212661662 is 266166212.

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

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 6464 + ... + 21612.

It is an arithmetic number, because the mean of its divisors is an integer number (39882375).

Almost surely, 2^212661662 is an apocalyptic number.

212661662 is a deficient number, since it is larger than the sum of its proper divisors (106397338).

212661662 is a wasteful number, since it uses less digits than its factorization.

212661662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22170.

The product of its digits is 10368, while the sum is 32.

The square root of 212661662 is about 14582.9236437691. The cubic root of 212661662 is about 596.8928837857.

The spelling of 212661662 in words is "two hundred twelve million, six hundred sixty-one thousand, six hundred sixty-two".