9661994 has 16 divisors (see below), whose sum is σ = 15331680. Its totient is φ = 4554000.

The previous prime is 9661991. The next prime is 9662021. The reversal of 9661994 is 4991669.

9661994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9661991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9032 + ... + 10044.

It is an arithmetic number, because the mean of its divisors is an integer number (958230).

Almost surely, 2^9661994 is an apocalyptic number.

9661994 is a deficient number, since it is larger than the sum of its proper divisors (5669686).

9661994 is a wasteful number, since it uses less digits than its factorization.

9661994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285.

The product of its digits is 104976, while the sum is 44.

The square root of 9661994 is about 3108.3748165239. The cubic root of 9661994 is about 212.9882218501.

The spelling of 9661994 in words is "nine million, six hundred sixty-one thousand, nine hundred ninety-four".