9540661 has 8 divisors (see below), whose sum is σ = 10370360. Its totient is φ = 8724672.

The previous prime is 9540649. The next prime is 9540673. The reversal of 9540661 is 1660459.

It is an interprime number because it is at equal distance from previous prime (9540649) and next prime (9540673).

It can be written as a sum of positive squares in 4 ways, for example, as 3538161 + 6002500 = 1881^2 + 2450^2 .

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 9540661 - 2⁹ = 9540149 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9540161) 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, 1950 + ... + 4783.

It is an arithmetic number, because the mean of its divisors is an integer number (1296295).

Almost surely, 2^9540661 is an apocalyptic number.

It is an amenable number.

9540661 is a deficient number, since it is larger than the sum of its proper divisors (829699).

9540661 is a wasteful number, since it uses less digits than its factorization.

9540661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6855.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 9540661 is about 3088.7960437685. The cubic root of 9540661 is about 212.0929119856.

It can be divided in two parts, 9540 and 661, that added together give a palindrome (10201).

The spelling of 9540661 in words is "nine million, five hundred forty thousand, six hundred sixty-one".