1188090666 has 56 divisors (see below), whose sum is σ = 3053719584. Its totient is φ = 339451560.

The previous prime is 1188090619. The next prime is 1188090667. The reversal of 1188090666 is 6660908811.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1188090667) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 48000 + ... + 68411.

Almost surely, 2^1188090666 is an apocalyptic number.

1188090666 is an abundant number, since it is smaller than the sum of its proper divisors (1865628918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1188090666 is an equidigital number, since it uses as much as digits as its factorization.

1188090666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116438 (or 116423 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1188090666 is about 34468.6910978645. The cubic root of 1188090666 is about 1059.1314428890.

The spelling of 1188090666 in words is "one billion, one hundred eighty-eight million, ninety thousand, six hundred sixty-six".