9779665 has 24 divisors (see below), whose sum is σ = 13789440. Its totient is φ = 6638688.

The previous prime is 9779659. The next prime is 9779701. The reversal of 9779665 is 5669779.

9779665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9779665 - 2⁵ = 9779633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a d-powerful number, because it can be written as 9⁷ + 7⁴ + 7⁶ + 9⁷ + 6⁵ + 6⁵ + 5⁷ .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43744 + ... + 43966.

It is an arithmetic number, because the mean of its divisors is an integer number (574560).

Almost surely, 2^9779665 is an apocalyptic number.

It is an amenable number.

9779665 is a deficient number, since it is larger than the sum of its proper divisors (4009775).

9779665 is a wasteful number, since it uses less digits than its factorization.

9779665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 414 counting only the distinct ones).

The product of its digits is 714420, while the sum is 49.

The square root of 9779665 is about 3127.2455931698. The cubic root of 9779665 is about 213.8493786830.

The spelling of 9779665 in words is "nine million, seven hundred seventy-nine thousand, six hundred sixty-five".