8661994 has 8 divisors (see below), whose sum is σ = 14174208. Its totient is φ = 3937260.

The previous prime is 8661977. The next prime is 8661997. The reversal of 8661994 is 4991668.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8661994.

It is not an unprimeable number, because it can be changed into a prime (8661997) by changing a digit.

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, 196842 + ... + 196885.

It is an arithmetic number, because the mean of its divisors is an integer number (1771776).

Almost surely, 2^8661994 is an apocalyptic number.

8661994 is a deficient number, since it is larger than the sum of its proper divisors (5512214).

8661994 is a wasteful number, since it uses less digits than its factorization.

8661994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393740.

The product of its digits is 93312, while the sum is 43.

The square root of 8661994 is about 2943.1265688040. The cubic root of 8661994 is about 205.3710827833.

The spelling of 8661994 in words is "eight million, six hundred sixty-one thousand, nine hundred ninety-four".