1165660663 has 8 divisors (see below), whose sum is σ = 1179763200. Its totient is φ = 1151637240.

The previous prime is 1165660649. The next prime is 1165660687. The reversal of 1165660663 is 3660665611.

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 1165660663 - 2²⁹ = 628789751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165660603) 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, 10138 + ... + 49336.

It is an arithmetic number, because the mean of its divisors is an integer number (147470400).

Almost surely, 2^1165660663 is an apocalyptic number.

1165660663 is a deficient number, since it is larger than the sum of its proper divisors (14102537).

1165660663 is a wasteful number, since it uses less digits than its factorization.

1165660663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39557.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 1165660663 is about 34141.7729914543. The cubic root of 1165660663 is about 1052.4239277904.

The spelling of 1165660663 in words is "one billion, one hundred sixty-five million, six hundred sixty thousand, six hundred sixty-three".