1166687712 has 144 divisors (see below), whose sum is σ = 3500340480. Its totient is φ = 382154112.

The previous prime is 1166687693. The next prime is 1166687729. The reversal of 1166687712 is 2177866611.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1166687712² = 2722320434663589888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 457513 + ... + 460055.

It is an arithmetic number, because the mean of its divisors is an integer number (24307920).

Almost surely, 2^1166687712 is an apocalyptic number.

1166687712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166687712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1750170240).

1166687712 is an abundant number, since it is smaller than the sum of its proper divisors (2333652768).

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

1166687712 is an equidigital number, since it uses as much as digits as its factorization.

1166687712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627 (or 2607 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 1166687712 is about 34156.8106239444. The cubic root of 1166687712 is about 1052.7329295662.

The spelling of 1166687712 in words is "one billion, one hundred sixty-six million, six hundred eighty-seven thousand, seven hundred twelve".