1165940666 has 8 divisors (see below), whose sum is σ = 1907902944. Its totient is φ = 529973020.

The previous prime is 1165940663. The next prime is 1165940669. The reversal of 1165940666 is 6660495611.

It is an interprime number because it is at equal distance from previous prime (1165940663) and next prime (1165940669).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1165940663) 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, 26498630 + ... + 26498673.

It is an arithmetic number, because the mean of its divisors is an integer number (238487868).

Almost surely, 2^1165940666 is an apocalyptic number.

1165940666 is a deficient number, since it is larger than the sum of its proper divisors (741962278).

1165940666 is a wasteful number, since it uses less digits than its factorization.

1165940666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52997316.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 1165940666 is about 34145.8733377842. The cubic root of 1165940666 is about 1052.5081885232.

Subtracting 1165940666 from its reverse (6660495611), we obtain a palindrome (5494554945).

It can be divided in two parts, 11659 and 40666, that added together give a palindrome (52325).

The spelling of 1165940666 in words is "one billion, one hundred sixty-five million, nine hundred forty thousand, six hundred sixty-six".