9665775 has 108 divisors (see below), whose sum is σ = 22110192. Its totient is φ = 3939840.

The previous prime is 9665767. The next prime is 9665827. The reversal of 9665775 is 5775669.

It is a happy number.

It is not a de Polignac number, because 9665775 - 2³ = 9665767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 9665775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 508716 + ... + 508734.

It is an arithmetic number, because the mean of its divisors is an integer number (204724).

Almost surely, 2^9665775 is an apocalyptic number.

9665775 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9665775 is an abundant number, since it is smaller than the sum of its proper divisors (12444417).

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

9665775 is a wasteful number, since it uses less digits than its factorization.

9665775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 51 counting only the distinct ones).

The product of its digits is 396900, while the sum is 45.

The square root of 9665775 is about 3108.9829526712. The cubic root of 9665775 is about 213.0160009139.

It can be divided in two parts, 9665 and 775, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 9665775 in words is "nine million, six hundred sixty-five thousand, seven hundred seventy-five".