1166402665 has 8 divisors (see below), whose sum is σ = 1420574400. Its totient is φ = 919194672.

The previous prime is 1166402663. The next prime is 1166402669. The reversal of 1166402665 is 5662046611.

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 1166402665 - 2¹ = 1166402663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166402663) 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, 1740565 + ... + 1741234.

It is an arithmetic number, because the mean of its divisors is an integer number (177571800).

Almost surely, 2^1166402665 is an apocalyptic number.

It is an amenable number.

1166402665 is a deficient number, since it is larger than the sum of its proper divisors (254171735).

1166402665 is an equidigital number, since it uses as much as digits as its factorization.

1166402665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3481871.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1166402665 is about 34152.6377458609. The cubic root of 1166402665 is about 1052.6471874543.

The spelling of 1166402665 in words is "one billion, one hundred sixty-six million, four hundred two thousand, six hundred sixty-five".