1165390666 has 8 divisors (see below), whose sum is σ = 1907002944. Its totient is φ = 529723020.

The previous prime is 1165390651. The next prime is 1165390693. The reversal of 1165390666 is 6660935611.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26486130 + ... + 26486173.

It is an arithmetic number, because the mean of its divisors is an integer number (238375368).

Almost surely, 2^1165390666 is an apocalyptic number.

1165390666 is a deficient number, since it is larger than the sum of its proper divisors (741612278).

1165390666 is a wasteful number, since it uses less digits than its factorization.

1165390666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52972316.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 1165390666 is about 34137.8187059455. The cubic root of 1165390666 is about 1052.3426653630.

The spelling of 1165390666 in words is "one billion, one hundred sixty-five million, three hundred ninety thousand, six hundred sixty-six".