1662321212 has 12 divisors (see below), whose sum is σ = 2911199760. Its totient is φ = 830549856.

The previous prime is 1662321169. The next prime is 1662321247. The reversal of 1662321212 is 2121232661.

It is a happy number.

It is a congruent 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, 146537 + ... + 157472.

It is an arithmetic number, because the mean of its divisors is an integer number (242599980).

Almost surely, 2^1662321212 is an apocalyptic number.

It is an amenable number.

1662321212 is a deficient number, since it is larger than the sum of its proper divisors (1248878548).

1662321212 is a wasteful number, since it uses less digits than its factorization.

1662321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305380 (or 305378 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 1662321212 is about 40771.5735776779. The cubic root of 1662321212 is about 1184.5997834269.

Adding to 1662321212 its reverse (2121232661), we get a palindrome (3783553873).

The spelling of 1662321212 in words is "one billion, six hundred sixty-two million, three hundred twenty-one thousand, two hundred twelve".