1165666011 has 8 divisors (see below), whose sum is σ = 1554426960. Its totient is φ = 777007872.

The previous prime is 1165666003. The next prime is 1165666031. The reversal of 1165666011 is 1106665611.

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

It is not a de Polignac number, because 1165666011 - 2³ = 1165666003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165666031) 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, 6531 + ... + 48723.

It is an arithmetic number, because the mean of its divisors is an integer number (194303370).

Almost surely, 2^1165666011 is an apocalyptic number.

1165666011 is a deficient number, since it is larger than the sum of its proper divisors (388760949).

1165666011 is an equidigital number, since it uses as much as digits as its factorization.

1165666011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51405.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1165666011 is about 34141.8513118431. The cubic root of 1165666011 is about 1052.4255372795.

The spelling of 1165666011 in words is "one billion, one hundred sixty-five million, six hundred sixty-six thousand, eleven".