662212421 has 32 divisors (see below), whose sum is σ = 766080000. Its totient is φ = 567959040.

The previous prime is 662212403. The next prime is 662212511. The reversal of 662212421 is 124212266.

It is a cyclic number.

It is not a de Polignac number, because 662212421 - 2¹⁸ = 661950277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662212721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1326830 + ... + 1327328.

It is an arithmetic number, because the mean of its divisors is an integer number (23940000).

Almost surely, 2^662212421 is an apocalyptic number.

It is an amenable number.

662212421 is a deficient number, since it is larger than the sum of its proper divisors (103867579).

662212421 is a wasteful number, since it uses less digits than its factorization.

662212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its digits is 2304, while the sum is 26.

The square root of 662212421 is about 25733.4883177544. The cubic root of 662212421 is about 871.6305445553.

Adding to 662212421 its reverse (124212266), we get a palindrome (786424687).

The spelling of 662212421 in words is "six hundred sixty-two million, two hundred twelve thousand, four hundred twenty-one".