1165430866 has 4 divisors (see below), whose sum is σ = 1748146302. Its totient is φ = 582715432.

The previous prime is 1165430857. The next prime is 1165430879. The reversal of 1165430866 is 6680345611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6680345611 = 47 ⋅142135013.

It can be written as a sum of positive squares in only one way, i.e., 1162469025 + 2961841 = 34095^2 + 1721^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291357715 + ... + 291357718.

Almost surely, 2^1165430866 is an apocalyptic number.

1165430866 is a deficient number, since it is larger than the sum of its proper divisors (582715436).

1165430866 is an equidigital number, since it uses as much as digits as its factorization.

1165430866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582715435.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1165430866 is about 34138.4074906842. The cubic root of 1165430866 is about 1052.3547653652.

The spelling of 1165430866 in words is "one billion, one hundred sixty-five million, four hundred thirty thousand, eight hundred sixty-six".