6642693 has 12 divisors (see below), whose sum is σ = 9703980. Its totient is φ = 4378176.

The previous prime is 6642659. The next prime is 6642707. The reversal of 6642693 is 3962466.

6642693 is a `hidden beast` number, since 6 + 642 + 6 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1361889 + 5280804 = 1167^2 + 2298^2 .

It is not a de Polignac number, because 6642693 - 2¹⁰ = 6641669 is a prime.

It is a super-3 number, since 3×6642693³ (a number of 21 digits) contains 333 as substring.

6642693 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3346 + ... + 4947.

It is an arithmetic number, because the mean of its divisors is an integer number (808665).

Almost surely, 2^6642693 is an apocalyptic number.

It is an amenable number.

6642693 is a deficient number, since it is larger than the sum of its proper divisors (3061287).

6642693 is a wasteful number, since it uses less digits than its factorization.

6642693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8388 (or 8385 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 6642693 is about 2577.3422357149. The cubic root of 6642693 is about 187.9813339699.

The spelling of 6642693 in words is "six million, six hundred forty-two thousand, six hundred ninety-three".