662006421 has 12 divisors (see below), whose sum is σ = 976577472. Its totient is φ = 431947176.

The previous prime is 662006399. The next prime is 662006453. The reversal of 662006421 is 124600266.

It is a happy number.

It is not a de Polignac number, because 662006421 - 2²² = 657812117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662006021) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 782091 + ... + 782936.

It is an arithmetic number, because the mean of its divisors is an integer number (81381456).

Almost surely, 2^662006421 is an apocalyptic number.

It is an amenable number.

662006421 is a deficient number, since it is larger than the sum of its proper divisors (314571051).

662006421 is a wasteful number, since it uses less digits than its factorization.

662006421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565080 (or 1565077 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 662006421 is about 25729.4854398606. The cubic root of 662006421 is about 871.5401533614.

Adding to 662006421 its reverse (124600266), we get a palindrome (786606687).

The spelling of 662006421 in words is "six hundred sixty-two million, six thousand, four hundred twenty-one".