1161066505 has 8 divisors (see below), whose sum is σ = 1393545672. Its totient is φ = 928675968.

The previous prime is 1161066481. The next prime is 1161066547. The reversal of 1161066505 is 5056601611.

It can be written as a sum of positive squares in 4 ways, for example, as 332259984 + 828806521 = 18228^2 + 28789^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161066505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11247 + ... + 49483.

It is an arithmetic number, because the mean of its divisors is an integer number (174193209).

Almost surely, 2^1161066505 is an apocalyptic number.

It is an amenable number.

1161066505 is a deficient number, since it is larger than the sum of its proper divisors (232479167).

1161066505 is an equidigital number, since it uses as much as digits as its factorization.

1161066505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44315.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1161066505 is about 34074.4259672852. The cubic root of 1161066505 is about 1051.0394860781.

The spelling of 1161066505 in words is "one billion, one hundred sixty-one million, sixty-six thousand, five hundred five".