1166201571 has 16 divisors (see below), whose sum is σ = 1562499200. Its totient is φ = 773696448.

The previous prime is 1166201549. The next prime is 1166201579. The reversal of 1166201571 is 1751026611.

It is not a de Polignac number, because 1166201571 - 2¹⁵ = 1166168803 is a prime.

It is a super-2 number, since 2×1166201571² = 2720052208405736082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166201579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 702975 + ... + 704631.

It is an arithmetic number, because the mean of its divisors is an integer number (97656200).

Almost surely, 2^1166201571 is an apocalyptic number.

1166201571 is a deficient number, since it is larger than the sum of its proper divisors (396297629).

1166201571 is a wasteful number, since it uses less digits than its factorization.

1166201571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1166201571 is about 34149.6935710996. The cubic root of 1166201571 is about 1052.5866899932.

The spelling of 1166201571 in words is "one billion, one hundred sixty-six million, two hundred one thousand, five hundred seventy-one".