1101421666 has 4 divisors (see below), whose sum is σ = 1652132502. Its totient is φ = 550710832.

The previous prime is 1101421639. The next prime is 1101421733. The reversal of 1101421666 is 6661241011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6661241011 = 3727 ⋅1787293.

It can be written as a sum of positive squares in only one way, i.e., 993573441 + 107848225 = 31521^2 + 10385^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275355415 + ... + 275355418.

Almost surely, 2^1101421666 is an apocalyptic number.

1101421666 is a deficient number, since it is larger than the sum of its proper divisors (550710836).

1101421666 is an equidigital number, since it uses as much as digits as its factorization.

1101421666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550710835.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1101421666 is about 33187.6734044434. The cubic root of 1101421666 is about 1032.7246384142.

Adding to 1101421666 its reverse (6661241011), we get a palindrome (7762662677).

The spelling of 1101421666 in words is "one billion, one hundred one million, four hundred twenty-one thousand, six hundred sixty-six".