6428661 has 8 divisors (see below), whose sum is σ = 8944320. Its totient is φ = 4099392.

The previous prime is 6428651. The next prime is 6428671. The reversal of 6428661 is 1668246.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6428651) and next prime (6428671).

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

It is not a de Polignac number, because 6428661 - 2¹¹ = 6426613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46516 + ... + 46653.

It is an arithmetic number, because the mean of its divisors is an integer number (1118040).

Almost surely, 2^6428661 is an apocalyptic number.

It is an amenable number.

6428661 is a deficient number, since it is larger than the sum of its proper divisors (2515659).

6428661 is a wasteful number, since it uses less digits than its factorization.

6428661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93195.

The product of its digits is 13824, while the sum is 33.

The square root of 6428661 is about 2535.4804278479. The cubic root of 6428661 is about 185.9402918537.

The spelling of 6428661 in words is "six million, four hundred twenty-eight thousand, six hundred sixty-one".