1166681380 has 12 divisors (see below), whose sum is σ = 2450030940. Its totient is φ = 466672544.

The previous prime is 1166681353. The next prime is 1166681381. The reversal of 1166681380 is 831866611.

It can be written as a sum of positive squares in 2 ways, for example, as 690743524 + 475937856 = 26282^2 + 21816^2 .

It is a super-2 number, since 2×1166681380² = 2722290884877408800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1166681381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29167015 + ... + 29167054.

It is an arithmetic number, because the mean of its divisors is an integer number (204169245).

Almost surely, 2^1166681380 is an apocalyptic number.

1166681380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166681380 is an abundant number, since it is smaller than the sum of its proper divisors (1283349560).

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

1166681380 is a wasteful number, since it uses less digits than its factorization.

1166681380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58334078 (or 58334076 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1166681380 is about 34156.7179336657. The cubic root of 1166681380 is about 1052.7310250529.

The spelling of 1166681380 in words is "one billion, one hundred sixty-six million, six hundred eighty-one thousand, three hundred eighty".