1165412566 has 4 divisors (see below), whose sum is σ = 1748118852. Its totient is φ = 582706282.

The previous prime is 1165412561. The next prime is 1165412581. The reversal of 1165412566 is 6652145611.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165412561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291353140 + ... + 291353143.

It is an arithmetic number, because the mean of its divisors is an integer number (437029713).

Almost surely, 2^1165412566 is an apocalyptic number.

1165412566 is a deficient number, since it is larger than the sum of its proper divisors (582706286).

1165412566 is an equidigital number, since it uses as much as digits as its factorization.

1165412566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582706285.

The product of its digits is 43200, while the sum is 37.

The square root of 1165412566 is about 34138.1394630697. The cubic root of 1165412566 is about 1052.3492571897.

The spelling of 1165412566 in words is "one billion, one hundred sixty-five million, four hundred twelve thousand, five hundred sixty-six".