6661742 has 8 divisors (see below), whose sum is σ = 10518600. Its totient is φ = 3155544.

The previous prime is 6661741. The next prime is 6661747. The reversal of 6661742 is 2471666.

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

It is a junction number, because it is equal to n+sod(n) for n = 6661699 and 6661708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661741) by changing a digit.

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, 87617 + ... + 87692.

It is an arithmetic number, because the mean of its divisors is an integer number (1314825).

Almost surely, 2^6661742 is an apocalyptic number.

6661742 is a deficient number, since it is larger than the sum of its proper divisors (3856858).

6661742 is a wasteful number, since it uses less digits than its factorization.

6661742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175330.

The product of its digits is 12096, while the sum is 32.

The square root of 6661742 is about 2581.0350636905. The cubic root of 6661742 is about 188.1608514727.

The spelling of 6661742 in words is "six million, six hundred sixty-one thousand, seven hundred forty-two".