6661743 has 32 divisors (see below), whose sum is σ = 10340352. Its totient is φ = 3775200.

The previous prime is 6661741. The next prime is 6661747. The reversal of 6661743 is 3471666.

It is not a de Polignac number, because 6661743 - 2¹ = 6661741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50788 + ... + 50918.

It is an arithmetic number, because the mean of its divisors is an integer number (323136).

Almost surely, 2^6661743 is an apocalyptic number.

6661743 is a deficient number, since it is larger than the sum of its proper divisors (3678609).

6661743 is a wasteful number, since it uses less digits than its factorization.

6661743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its digits is 18144, while the sum is 33.

The square root of 6661743 is about 2581.0352574113. The cubic root of 6661743 is about 188.1608608877.

The spelling of 6661743 in words is "six million, six hundred sixty-one thousand, seven hundred forty-three".