1166961767 has 4 divisors (see below), whose sum is σ = 1186740840. Its totient is φ = 1147182696.

The previous prime is 1166961743. The next prime is 1166961793. The reversal of 1166961767 is 7671696611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7671696611 = 239 ⋅32099149.

It is a cyclic number.

It is not a de Polignac number, because 1166961767 - 2¹⁴ = 1166945383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166961707) 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, 9889448 + ... + 9889565.

It is an arithmetic number, because the mean of its divisors is an integer number (296685210).

Almost surely, 2^1166961767 is an apocalyptic number.

1166961767 is a deficient number, since it is larger than the sum of its proper divisors (19779073).

1166961767 is an equidigital number, since it uses as much as digits as its factorization.

1166961767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19779072.

The product of its digits is 571536, while the sum is 50.

The square root of 1166961767 is about 34160.8221066180. The cubic root of 1166961767 is about 1052.8153521183.

The spelling of 1166961767 in words is "one billion, one hundred sixty-six million, nine hundred sixty-one thousand, seven hundred sixty-seven".