11722270665 has 32 divisors (see below), whose sum is σ = 21499831296. Its totient is φ = 5342546880.

The previous prime is 11722270663. The next prime is 11722270687. The reversal of 11722270665 is 56607222711.

It is not a de Polignac number, because 11722270665 - 2¹ = 11722270663 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11722270663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133887 + ... + 203396.

It is an arithmetic number, because the mean of its divisors is an integer number (671869728).

Almost surely, 2^11722270665 is an apocalyptic number.

11722270665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11722270665 is a deficient number, since it is larger than the sum of its proper divisors (9777560631).

11722270665 is a wasteful number, since it uses less digits than its factorization.

11722270665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337629.

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 11722270665 in words is "eleven billion, seven hundred twenty-two million, two hundred seventy thousand, six hundred sixty-five".