6663958 has 8 divisors (see below), whose sum is σ = 11423952. Its totient is φ = 2855976.

The previous prime is 6663941. The next prime is 6663961. The reversal of 6663958 is 8593666.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 237985 + ... + 238012.

It is an arithmetic number, because the mean of its divisors is an integer number (1427994).

Almost surely, 2^6663958 is an apocalyptic number.

6663958 is a deficient number, since it is larger than the sum of its proper divisors (4759994).

6663958 is a wasteful number, since it uses less digits than its factorization.

6663958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476006.

The product of its digits is 233280, while the sum is 43.

The square root of 6663958 is about 2581.4643131370. The cubic root of 6663958 is about 188.1817127941.

It can be divided in two parts, 666 and 3958, that added together give a square (4624 = 68²).

The spelling of 6663958 in words is "six million, six hundred sixty-three thousand, nine hundred fifty-eight".