1158666915 has 16 divisors (see below), whose sum is σ = 2118705408. Its totient is φ = 529676256.

The previous prime is 1158666907. The next prime is 1158666923. The reversal of 1158666915 is 5196668511.

1158666915 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1158666907) and next prime (1158666923).

It is not a de Polignac number, because 1158666915 - 2³ = 1158666907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5517357 + ... + 5517566.

It is an arithmetic number, because the mean of its divisors is an integer number (132419088).

Almost surely, 2^1158666915 is an apocalyptic number.

1158666915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1158666915 is a deficient number, since it is larger than the sum of its proper divisors (960038493).

1158666915 is a wasteful number, since it uses less digits than its factorization.

1158666915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11034938.

The product of its digits is 388800, while the sum is 48.

The square root of 1158666915 is about 34039.1967443417. The cubic root of 1158666915 is about 1050.3149214107.

The spelling of 1158666915 in words is "one billion, one hundred fifty-eight million, six hundred sixty-six thousand, nine hundred fifteen".