9661552013 has 8 divisors (see below), whose sum is σ = 10335343032. Its totient is φ = 8999479296.

The previous prime is 9661552007. The next prime is 9661552027. The reversal of 9661552013 is 3102551669.

It can be written as a sum of positive squares in 4 ways, for example, as 1457177929 + 8204374084 = 38173^2 + 90578^2 .

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 9661552013 - 2¹⁶ = 9661486477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661551013) 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, 2927870 + ... + 2931167.

It is an arithmetic number, because the mean of its divisors is an integer number (1291917879).

Almost surely, 2^9661552013 is an apocalyptic number.

It is an amenable number.

9661552013 is a deficient number, since it is larger than the sum of its proper divisors (673791019).

9661552013 is a wasteful number, since it uses less digits than its factorization.

9661552013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5859151.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 9661552013 is about 98293.1941336734. The cubic root of 9661552013 is about 2129.8497409194.

The spelling of 9661552013 in words is "nine billion, six hundred sixty-one million, five hundred fifty-two thousand, thirteen".