9660365556 has 12 divisors (see below), whose sum is σ = 22540852992. Its totient is φ = 3220121848.

The previous prime is 9660365551. The next prime is 9660365569. The reversal of 9660365556 is 6555630669.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 9660365499 and 9660365508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9660365551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402515220 + ... + 402515243.

It is an arithmetic number, because the mean of its divisors is an integer number (1878404416).

Almost surely, 2^9660365556 is an apocalyptic number.

It is an amenable number.

9660365556 is an abundant number, since it is smaller than the sum of its proper divisors (12880487436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9660365556 is a wasteful number, since it uses less digits than its factorization.

9660365556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805030470 (or 805030468 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 51.

The square root of 9660365556 is about 98287.1586525931. The cubic root of 9660365556 is about 2129.7625541480.

The spelling of 9660365556 in words is "nine billion, six hundred sixty million, three hundred sixty-five thousand, five hundred fifty-six".