1166664678 has 24 divisors (see below), whose sum is σ = 2478661512. Its totient is φ = 366011904.

The previous prime is 1166664637. The next prime is 1166664679. The reversal of 1166664678 is 8764666611.

It is a super-2 number, since 2×1166664678² = 2722212941785687368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 1166664678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166664679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334675 + ... + 338142.

It is an arithmetic number, because the mean of its divisors is an integer number (103277563).

Almost surely, 2^1166664678 is an apocalyptic number.

1166664678 is an abundant number, since it is smaller than the sum of its proper divisors (1311996834).

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

1166664678 is a wasteful number, since it uses less digits than its factorization.

1166664678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672856 (or 672839 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 1166664678 is about 34156.4734420871. The cubic root of 1166664678 is about 1052.7260014598.

The spelling of 1166664678 in words is "one billion, one hundred sixty-six million, six hundred sixty-four thousand, six hundred seventy-eight".