6668554 has 8 divisors (see below), whose sum is σ = 10014660. Its totient is φ = 3330336.

The previous prime is 6668549. The next prime is 6668567. The reversal of 6668554 is 4558666.

It can be written as a sum of positive squares in 2 ways, for example, as 4092529 + 2576025 = 2023^2 + 1605^2 .

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

It is a super-2 number, since 2×6668554² = 88939224901832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1102 + ... + 3814.

Almost surely, 2^6668554 is an apocalyptic number.

6668554 is a deficient number, since it is larger than the sum of its proper divisors (3346106).

6668554 is a wasteful number, since it uses less digits than its factorization.

6668554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944.

The product of its digits is 172800, while the sum is 40.

The square root of 6668554 is about 2582.3543521368. The cubic root of 6668554 is about 188.2249645871.

The spelling of 6668554 in words is "six million, six hundred sixty-eight thousand, five hundred fifty-four".