6619657 has 12 divisors (see below), whose sum is σ = 7626096. Its totient is φ = 5697720.

The previous prime is 6619651. The next prime is 6619673. The reversal of 6619657 is 7569166.

It is not a de Polignac number, because 6619657 - 2³ = 6619649 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6619651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3138 + ... + 4804.

It is an arithmetic number, because the mean of its divisors is an integer number (635508).

Almost surely, 2^6619657 is an apocalyptic number.

It is an amenable number.

6619657 is a deficient number, since it is larger than the sum of its proper divisors (1006439).

6619657 is a wasteful number, since it uses less digits than its factorization.

6619657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716 (or 1697 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 6619657 is about 2572.8694098224. The cubic root of 6619657 is about 187.7637839813.

The spelling of 6619657 in words is "six million, six hundred nineteen thousand, six hundred fifty-seven".