1158666556 has 6 divisors (see below), whose sum is σ = 2027666480. Its totient is φ = 579333276.

The previous prime is 1158666539. The next prime is 1158666557. The reversal of 1158666556 is 6556668511.

It is a super-2 number, since 2×1158666556² = 2685016375985802272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158666557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144833316 + ... + 144833323.

Almost surely, 2^1158666556 is an apocalyptic number.

It is an amenable number.

1158666556 is a deficient number, since it is larger than the sum of its proper divisors (868999924).

1158666556 is a wasteful number, since it uses less digits than its factorization.

1158666556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289666643 (or 289666641 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 49.

The square root of 1158666556 is about 34039.1914710088. The cubic root of 1158666556 is about 1050.3148129346.

The spelling of 1158666556 in words is "one billion, one hundred fifty-eight million, six hundred sixty-six thousand, five hundred fifty-six".