6642458 has 4 divisors (see below), whose sum is σ = 9963690. Its totient is φ = 3321228.

The previous prime is 6642439. The next prime is 6642487. The reversal of 6642458 is 8542466.

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

It can be written as a sum of positive squares in only one way, i.e., 5303809 + 1338649 = 2303^2 + 1157^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660613 + ... + 1660616.

Almost surely, 2^6642458 is an apocalyptic number.

6642458 is a deficient number, since it is larger than the sum of its proper divisors (3321232).

6642458 is a wasteful number, since it uses less digits than its factorization.

6642458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321231.

The product of its digits is 46080, while the sum is 35.

The square root of 6642458 is about 2577.2966457123. The cubic root of 6642458 is about 187.9791171915.

It can be divided in two parts, 66 and 42458, that added together give a palindrome (42524).

The spelling of 6642458 in words is "six million, six hundred forty-two thousand, four hundred fifty-eight".