1166570215 has 4 divisors (see below), whose sum is σ = 1399884264. Its totient is φ = 933256168.

The previous prime is 1166570213. The next prime is 1166570231. The reversal of 1166570215 is 5120756611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5120756611 = 257 ⋅19925123.

It is a cyclic number.

It is not a de Polignac number, because 1166570215 - 2¹ = 1166570213 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 (1166570213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116657017 + ... + 116657026.

It is an arithmetic number, because the mean of its divisors is an integer number (349971066).

Almost surely, 2^1166570215 is an apocalyptic number.

1166570215 is a deficient number, since it is larger than the sum of its proper divisors (233314049).

1166570215 is an equidigital number, since it uses as much as digits as its factorization.

1166570215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233314048.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1166570215 is about 34155.0906161878. The cubic root of 1166570215 is about 1052.6975881713.

The spelling of 1166570215 in words is "one billion, one hundred sixty-six million, five hundred seventy thousand, two hundred fifteen".