6612021 has 24 divisors (see below), whose sum is σ = 10622976. Its totient is φ = 3935520.

The previous prime is 6612013. The next prime is 6612041. The reversal of 6612021 is 1202166.

It is a happy number.

6612021 is a `hidden beast` number, since 661 + 2 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 6612021 - 2³ = 6612013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6611985 and 6612003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6612041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2716 + ... + 4538.

It is an arithmetic number, because the mean of its divisors is an integer number (442624).

Almost surely, 2^6612021 is an apocalyptic number.

It is an amenable number.

6612021 is a deficient number, since it is larger than the sum of its proper divisors (4010955).

6612021 is a wasteful number, since it uses less digits than its factorization.

6612021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873 (or 1870 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 6612021 is about 2571.3850353457. The cubic root of 6612021 is about 187.6915588944.

Adding to 6612021 its reverse (1202166), we get a palindrome (7814187).

The spelling of 6612021 in words is "six million, six hundred twelve thousand, twenty-one".