1166661018 has 48 divisors (see below), whose sum is σ = 2576598336. Its totient is φ = 381447360.

The previous prime is 1166661011. The next prime is 1166661029. The reversal of 1166661018 is 8101666611.

It is a super-2 number, since 2×1166661018² = 2722195861841592648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1166661011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195438 + ... + 201318.

It is an arithmetic number, because the mean of its divisors is an integer number (53679132).

Almost surely, 2^1166661018 is an apocalyptic number.

1166661018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1166661018 is an abundant number, since it is smaller than the sum of its proper divisors (1409937318).

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

1166661018 is a wasteful number, since it uses less digits than its factorization.

1166661018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6099 (or 6096 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1166661018 is about 34156.4198650854. The cubic root of 1166661018 is about 1052.7249006062.

The spelling of 1166661018 in words is "one billion, one hundred sixty-six million, six hundred sixty-one thousand, eighteen".