8666749 has 8 divisors (see below), whose sum is σ = 10666880. Its totient is φ = 6857136.

The previous prime is 8666747. The next prime is 8666767. The reversal of 8666749 is 9476668.

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

It is not a de Polignac number, because 8666749 - 2¹ = 8666747 is a prime.

It is a super-2 number, since 2×8666749² = 150225076458002, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8666699 and 8666708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8666747) 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 7 ways as a sum of consecutive naturals, for example, 47529 + ... + 47710.

It is an arithmetic number, because the mean of its divisors is an integer number (1333360).

Almost surely, 2^8666749 is an apocalyptic number.

It is an amenable number.

8666749 is a deficient number, since it is larger than the sum of its proper divisors (2000131).

8666749 is a wasteful number, since it uses less digits than its factorization.

8666749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95259.

The product of its digits is 435456, while the sum is 46.

The square root of 8666749 is about 2943.9342723641. The cubic root of 8666749 is about 205.4086553816.

The spelling of 8666749 in words is "eight million, six hundred sixty-six thousand, seven hundred forty-nine".