9942661 has 8 divisors (see below), whose sum is σ = 10304000. Its totient is φ = 9583920.

The previous prime is 9942659. The next prime is 9942683. The reversal of 9942661 is 1662499.

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

It is a cyclic number.

It is not a de Polignac number, because 9942661 - 2¹ = 9942659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9942661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9942461) 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, 10360 + ... + 11278.

It is an arithmetic number, because the mean of its divisors is an integer number (1288000).

Almost surely, 2^9942661 is an apocalyptic number.

9942661 is the 1821-st hex number.

It is an amenable number.

9942661 is a deficient number, since it is larger than the sum of its proper divisors (361339).

9942661 is a wasteful number, since it uses less digits than its factorization.

9942661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299.

The product of its digits is 23328, while the sum is 37.

The square root of 9942661 is about 3153.1985348214. The cubic root of 9942661 is about 215.0309023546.

It can be divided in two parts, 994 and 2661, that added together give a triangular number (3655 = T₈₅).

The spelling of 9942661 in words is "nine million, nine hundred forty-two thousand, six hundred sixty-one".