1165641606 has 24 divisors (see below), whose sum is σ = 2550566304. Its totient is φ = 384699600.

The previous prime is 1165641563. The next prime is 1165641611. The reversal of 1165641606 is 6061465611.

It is a happy number.

1165641606 is a `hidden beast` number, since 1 + 1 + 6 + 5 + 6 + 41 + 606 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318766 + ... + 322401.

It is an arithmetic number, because the mean of its divisors is an integer number (106273596).

Almost surely, 2^1165641606 is an apocalyptic number.

1165641606 is an abundant number, since it is smaller than the sum of its proper divisors (1384924698).

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

1165641606 is a wasteful number, since it uses less digits than its factorization.

1165641606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641276 (or 641273 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1165641606 is about 34141.4939040459. The cubic root of 1165641606 is about 1052.4181925158.

The spelling of 1165641606 in words is "one billion, one hundred sixty-five million, six hundred forty-one thousand, six hundred six".