6661654 has 8 divisors (see below), whose sum is σ = 10580328. Its totient is φ = 3134880.

The previous prime is 6661649. The next prime is 6661661. The reversal of 6661654 is 4561666.

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 195931 = 6661654 / (6 + 6 + 6 + 1 + 6 + 5 + 4).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97932 + ... + 97999.

It is an arithmetic number, because the mean of its divisors is an integer number (1322541).

Almost surely, 2^6661654 is an apocalyptic number.

6661654 is a deficient number, since it is larger than the sum of its proper divisors (3918674).

6661654 is a wasteful number, since it uses less digits than its factorization.

6661654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195950.

The product of its digits is 25920, while the sum is 34.

The square root of 6661654 is about 2581.0180162099. The cubic root of 6661654 is about 188.1600229493.

The spelling of 6661654 in words is "six million, six hundred sixty-one thousand, six hundred fifty-four".