6642437 has 4 divisors (see below), whose sum is σ = 6767820. Its totient is φ = 6517056.

The previous prime is 6642431. The next prime is 6642439. The reversal of 6642437 is 7342466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5317636 + 1324801 = 2306^2 + 1151^2 .

It is a cyclic number.

It is not a de Polignac number, because 6642437 - 2⁶ = 6642373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642431) 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 3 ways as a sum of consecutive naturals, for example, 62612 + ... + 62717.

It is an arithmetic number, because the mean of its divisors is an integer number (1691955).

Almost surely, 2^6642437 is an apocalyptic number.

It is an amenable number.

6642437 is a deficient number, since it is larger than the sum of its proper divisors (125383).

6642437 is a wasteful number, since it uses less digits than its factorization.

6642437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125382.

The product of its digits is 24192, while the sum is 32.

The square root of 6642437 is about 2577.2925716728. The cubic root of 6642437 is about 187.9789190939.

The spelling of 6642437 in words is "six million, six hundred forty-two thousand, four hundred thirty-seven".