6553994 has 4 divisors (see below), whose sum is σ = 9830994. Its totient is φ = 3276996.

The previous prime is 6553979. The next prime is 6554021. The reversal of 6553994 is 4993556.

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., 5583769 + 970225 = 2363^2 + 985^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1638497 + ... + 1638500.

Almost surely, 2^6553994 is an apocalyptic number.

6553994 is a deficient number, since it is larger than the sum of its proper divisors (3277000).

6553994 is a wasteful number, since it uses less digits than its factorization.

6553994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276999.

The product of its digits is 145800, while the sum is 41.

The square root of 6553994 is about 2560.0769519684. The cubic root of 6553994 is about 187.1408853755.

The spelling of 6553994 in words is "six million, five hundred fifty-three thousand, nine hundred ninety-four".