9723377665 has 16 divisors (see below), whose sum is σ = 12090592080. Its totient is φ = 7497907200.

The previous prime is 9723377603. The next prime is 9723377753. The reversal of 9723377665 is 5667733279.

It can be written as a sum of positive squares in 8 ways, for example, as 628849 + 9722748816 = 793^2 + 98604^2 .

It is not a de Polignac number, because 9723377665 - 2¹⁷ = 9723246593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31357 + ... + 142933.

It is an arithmetic number, because the mean of its divisors is an integer number (755662005).

Almost surely, 2^9723377665 is an apocalyptic number.

It is an amenable number.

9723377665 is a deficient number, since it is larger than the sum of its proper divisors (2367214415).

9723377665 is a wasteful number, since it uses less digits than its factorization.

9723377665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112212.

The product of its digits is 10001880, while the sum is 55.

The square root of 9723377665 is about 98607.1887085318. The cubic root of 9723377665 is about 2134.3831555888.

The spelling of 9723377665 in words is "nine billion, seven hundred twenty-three million, three hundred seventy-seven thousand, six hundred sixty-five".