9661965 has 8 divisors (see below), whose sum is σ = 15459168. Its totient is φ = 5153040.

The previous prime is 9661957. The next prime is 9661969. The reversal of 9661965 is 5691669.

9661965 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9661965 - 2³ = 9661957 is a prime.

It is a super-2 number, since 2×9661965² = 186707135322450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661969) 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, 322051 + ... + 322080.

It is an arithmetic number, because the mean of its divisors is an integer number (1932396).

Almost surely, 2^9661965 is an apocalyptic number.

It is an amenable number.

9661965 is a deficient number, since it is larger than the sum of its proper divisors (5797203).

9661965 is a wasteful number, since it uses less digits than its factorization.

9661965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644139.

The product of its digits is 87480, while the sum is 42.

The square root of 9661965 is about 3108.3701517033. The cubic root of 9661965 is about 212.9880087587.

The spelling of 9661965 in words is "nine million, six hundred sixty-one thousand, nine hundred sixty-five".