1151556665 has 8 divisors (see below), whose sum is σ = 1579277760. Its totient is φ = 789638832.

The previous prime is 1151556647. The next prime is 1151556673. The reversal of 1151556665 is 5666551511.

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

It is a cyclic number.

It is not a de Polignac number, because 1151556665 - 2⁸ = 1151556409 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16450775 + ... + 16450844.

It is an arithmetic number, because the mean of its divisors is an integer number (197409720).

Almost surely, 2^1151556665 is an apocalyptic number.

It is an amenable number.

1151556665 is a deficient number, since it is larger than the sum of its proper divisors (427721095).

1151556665 is an equidigital number, since it uses as much as digits as its factorization.

1151556665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32901631.

The product of its digits is 135000, while the sum is 41.

The square root of 1151556665 is about 33934.5939271417. The cubic root of 1151556665 is about 1048.1620651532.

The spelling of 1151556665 in words is "one billion, one hundred fifty-one million, five hundred fifty-six thousand, six hundred sixty-five".