11630720665 has 16 divisors (see below), whose sum is σ = 14017015296. Its totient is φ = 9264528000.

The previous prime is 11630720641. The next prime is 11630720671. The reversal of 11630720665 is 56602703611.

It is not a de Polignac number, because 11630720665 - 2⁷ = 11630720537 is a prime.

It is a Duffinian number.

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, 2739034 + ... + 2743276.

It is an arithmetic number, because the mean of its divisors is an integer number (876063456).

Almost surely, 2^11630720665 is an apocalyptic number.

It is an amenable number.

11630720665 is a deficient number, since it is larger than the sum of its proper divisors (2386294631).

11630720665 is a wasteful number, since it uses less digits than its factorization.

11630720665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 11630720665 in words is "eleven billion, six hundred thirty million, seven hundred twenty thousand, six hundred sixty-five".