6657494 has 4 divisors (see below), whose sum is σ = 9986244. Its totient is φ = 3328746.

The previous prime is 6657473. The next prime is 6657517. The reversal of 6657494 is 4947566.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1664372 + ... + 1664375.

It is an arithmetic number, because the mean of its divisors is an integer number (2496561).

Almost surely, 2^6657494 is an apocalyptic number.

6657494 is a deficient number, since it is larger than the sum of its proper divisors (3328750).

6657494 is a wasteful number, since it uses less digits than its factorization.

6657494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328749.

The product of its digits is 181440, while the sum is 41.

The square root of 6657494 is about 2580.2120067932. The cubic root of 6657494 is about 188.1208480594.

The spelling of 6657494 in words is "six million, six hundred fifty-seven thousand, four hundred ninety-four".