1166467978 has 8 divisors (see below), whose sum is σ = 1884294468. Its totient is φ = 538369824.

The previous prime is 1166467933. The next prime is 1166467979. The reversal of 1166467978 is 8797646611.

It can be written as a sum of positive squares in 2 ways, for example, as 925193889 + 241274089 = 30417^2 + 15533^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1166467979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22432051 + ... + 22432102.

Almost surely, 2^1166467978 is an apocalyptic number.

1166467978 is a deficient number, since it is larger than the sum of its proper divisors (717826490).

1166467978 is a wasteful number, since it uses less digits than its factorization.

1166467978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44864168.

The product of its digits is 3048192, while the sum is 55.

The square root of 1166467978 is about 34153.5939250908. The cubic root of 1166467978 is about 1052.6668348324. Note that the first 3 decimals are identical.

The spelling of 1166467978 in words is "one billion, one hundred sixty-six million, four hundred sixty-seven thousand, nine hundred seventy-eight".