1166013261 has 108 divisors (see below), whose sum is σ = 2161111680. Its totient is φ = 601745760.

The previous prime is 1166013239. The next prime is 1166013263. The reversal of 1166013261 is 1623106611.

It is not a de Polignac number, because 1166013261 - 2⁵ = 1166013229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166013263) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 17403150 + ... + 17403216.

Almost surely, 2^1166013261 is an apocalyptic number.

It is an amenable number.

1166013261 is a deficient number, since it is larger than the sum of its proper divisors (995098419).

1166013261 is a wasteful number, since it uses less digits than its factorization.

1166013261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1166013261 is about 34146.9363340256. The cubic root of 1166013261 is about 1052.5300321866.

Adding to 1166013261 its reverse (1623106611), we get a palindrome (2789119872).

The spelling of 1166013261 in words is "one billion, one hundred sixty-six million, thirteen thousand, two hundred sixty-one".