1166623773 has 16 divisors (see below), whose sum is σ = 1779056640. Its totient is φ = 666138096.

The previous prime is 1166623751. The next prime is 1166623811. The reversal of 1166623773 is 3773266611.

It is a happy number.

It is not a de Polignac number, because 1166623773 - 2⁶ = 1166623709 is a prime.

It is a super-2 number, since 2×1166623773² = 2722022055457511058, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166623723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8388 + ... + 49026.

It is an arithmetic number, because the mean of its divisors is an integer number (111191040).

Almost surely, 2^1166623773 is an apocalyptic number.

It is an amenable number.

1166623773 is a deficient number, since it is larger than the sum of its proper divisors (612432867).

1166623773 is a wasteful number, since it uses less digits than its factorization.

1166623773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42016.

The product of its digits is 190512, while the sum is 42.

The square root of 1166623773 is about 34155.8746484408. The cubic root of 1166623773 is about 1052.7136979359.

The spelling of 1166623773 in words is "one billion, one hundred sixty-six million, six hundred twenty-three thousand, seven hundred seventy-three".