1115506566 has 24 divisors (see below), whose sum is σ = 2506447944. Its totient is φ = 371835360.

The previous prime is 1115506541. The next prime is 1115506577. The reversal of 1115506566 is 6656055111.

It is a super-2 number, since 2×1115506566² = 2488709797578224712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1115506566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1147155 + ... + 1148126.

It is an arithmetic number, because the mean of its divisors is an integer number (104435331).

Almost surely, 2^1115506566 is an apocalyptic number.

1115506566 is an abundant number, since it is smaller than the sum of its proper divisors (1390941378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115506566 is an equidigital number, since it uses as much as digits as its factorization.

1115506566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295298 (or 2295286 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1115506566 is about 33399.2000802414. The cubic root of 1115506566 is about 1037.1081416756.

The spelling of 1115506566 in words is "one billion, one hundred fifteen million, five hundred six thousand, five hundred sixty-six".