11666555422 has 32 divisors (see below), whose sum is σ = 18889334784. Its totient is φ = 5384265600.

The previous prime is 11666555413. The next prime is 11666555423. The reversal of 11666555422 is 22455566611.

It is a super-2 number, since 2×11666555422² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666555423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448423 + ... + 473725.

It is an arithmetic number, because the mean of its divisors is an integer number (590291712).

Almost surely, 2^11666555422 is an apocalyptic number.

11666555422 is a deficient number, since it is larger than the sum of its proper divisors (7222779362).

11666555422 is a wasteful number, since it uses less digits than its factorization.

11666555422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25584.

The product of its digits is 432000, while the sum is 43.

The spelling of 11666555422 in words is "eleven billion, six hundred sixty-six million, five hundred fifty-five thousand, four hundred twenty-two".