1131666649 has 8 divisors (see below), whose sum is σ = 1155446208. Its totient is φ = 1108089840.

The previous prime is 1131666643. The next prime is 1131666661. The reversal of 1131666649 is 9466661311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131666649 - 2⁷ = 1131666521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131666643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39382 + ... + 61759.

It is an arithmetic number, because the mean of its divisors is an integer number (144430776).

Almost surely, 2^1131666649 is an apocalyptic number.

It is an amenable number.

1131666649 is a deficient number, since it is larger than the sum of its proper divisors (23779559).

1131666649 is a wasteful number, since it uses less digits than its factorization.

1131666649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101375.

The product of its digits is 139968, while the sum is 43.

The square root of 1131666649 is about 33640.2534027317. The cubic root of 1131666649 is about 1042.0922651049.

The spelling of 1131666649 in words is "one billion, one hundred thirty-one million, six hundred sixty-six thousand, six hundred forty-nine".