1166628265 has 16 divisors (see below), whose sum is σ = 1537347456. Its totient is φ = 842832000.

The previous prime is 1166628263. The next prime is 1166628271. The reversal of 1166628265 is 5628266611.

It is not a de Polignac number, because 1166628265 - 2¹ = 1166628263 is a prime.

It is a super-2 number, since 2×1166628265² = 2722043017393820450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166628263) 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, 61932 + ... + 78541.

It is an arithmetic number, because the mean of its divisors is an integer number (96084216).

Almost surely, 2^1166628265 is an apocalyptic number.

It is an amenable number.

1166628265 is a deficient number, since it is larger than the sum of its proper divisors (370719191).

1166628265 is a wasteful number, since it uses less digits than its factorization.

1166628265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140640.

The product of its digits is 207360, while the sum is 43.

The square root of 1166628265 is about 34155.9404057332. The cubic root of 1166628265 is about 1052.7150490667.

The spelling of 1166628265 in words is "one billion, one hundred sixty-six million, six hundred twenty-eight thousand, two hundred sixty-five".