1165661072 has 20 divisors (see below), whose sum is σ = 2258997900. Its totient is φ = 582693888.

The previous prime is 1165661069. The next prime is 1165661111. The reversal of 1165661072 is 2701665611.

It can be written as a sum of positive squares in 2 ways, for example, as 71639296 + 1094021776 = 8464^2 + 33076^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127304 + ... + 136152.

It is an arithmetic number, because the mean of its divisors is an integer number (112949895).

Almost surely, 2^1165661072 is an apocalyptic number.

It is an amenable number.

1165661072 is a deficient number, since it is larger than the sum of its proper divisors (1093336828).

1165661072 is an equidigital number, since it uses as much as digits as its factorization.

1165661072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17090 (or 17084 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1165661072 is about 34141.7789811837. The cubic root of 1165661072 is about 1052.4240508798.

The spelling of 1165661072 in words is "one billion, one hundred sixty-five million, six hundred sixty-one thousand, seventy-two".